Samuel Kvarzell (top left), Erik Naslund (top right), Eric Jansberger (bottom left) and Markus Asberg (bottom right) subdued an enraged homeless man who was viciously beating another rider on the train. They stopped the violence and held the attacker until the NYPD could arrive. The friends sprang into action after a frantic conductor yelled over the intercom: 'Are there any police officers on the train?'

Sawyer Sweeten, 19, shot himself on the front porch of a house while visiting family in Texas yesterday. Mr Sweeten (pictured riding a motorbike last month) appeared in 139 episodes of the popular US sitcom and also took small parts in television shows Even Stevens and Frank McKlusky C.I alongside his twin brother Sullivan (front right) in the early 2000s. The teenager played Geoffrey Barone on Everybody Loves Raymond, while his twin brother played Michael. Their older sister Madylin (third from left) also played their older sibling on the show, Ally.

Nestled in some of the most beautiful corners of the world, are hidden settlements of people who have adapted to live in some very unusual places. The settlement of Aogashima is in the crater of an active volcano in the Philippine Sea (main), the incredible cliff village of Bandiagara in Mali (inset, right) seems to defy gravity, while Monsanto, in Portugal (inset, left) sits among gigantic granite boulders.

Barholm Castle (left) in Dumfries and Galloway is on the market for £695,000, which means owners Janet and John Brennan (inset) will lose a six-figure sum after spending thousands on renovations. The couple bought the crumbling castle (top right) for just £65,000 in 1997 and spent years chasing planning permission and carrying out a restoration. Now it boasts four luxury bedrooms, as well as a kitchen that was formerly a vaulted chamber and a living room (bottom right) that was converted from a great hall. Despite the financial loss, the couple insist the project was a 'labour of love' and they have 'no regrets'.

Raising a pint to the patron saint of England, Nigel Farage (pictured on the campaign trail yesterday) is himself the toast of a considerable chunk of the electorate in Thanet South. His appearance on an impromptu walkabout down Ramsgate High Street causes even more head-turning, more selfies, more spilling out of pubs, more heckling and more chaos than the appearance of Boris Johnson a few hours earlier, writes ROBERT HARDMAN.

The shocking images were taken in ISIS-held territory in the province of Homs and show the two accused men being savagely executed by up to four jihadis. Huge, bloodthirsty crowds are seen in the desert clearing where the group of executioners made a display of hugging the blindfolded couple (top and bottom left) and telling them they were forgiven of their 'sins', before pummeling them to death with hundreds of fist-sized rocks (main image).

Ciudad Real airport was built in 2009 at a cost of more €1billion - Spain's economy having taken off - but was closed three years later when its parent company fell into financial difficulties. The judge in charge of its administration at the time ruled that it should be sold off, with an asking price of €100million (£86million). However, there have been no takers and there is now no minimum asking price.

Photographer Martin Beck has snapped Captain America, Iron Man and the Green Lantern taking a step back from fighting crime and portrays how they are instead focusing on the struggles of getting through the week. The Dubai-based snapper produced the series of gritty portraits laced with melancholy humour in his latest project called We Can Be Heroes. The female Captain America seems to have lost her mask and is using face paint instead, while smoking on the New Zealand sidewalk (main photo); not too bothered about the Joker these days, the Bat family have a little one on the way (inset).

SEBASTIAN SHAKESPEARE: he Wire actor Dominic West and his wife Catherine Fitzgerald (pictured) are reluctantly selling her ancestral home in West Limerick for £4.6 million because of the cost of its upkeep. The castle is the home of the Knights of Glin. West's wife Catherine is the daughter of the 29th and last Knight of Glin, Desmond Fitzgerald, who died in 2011.

Dover Street Market in Mayfair, London, is the only UK shop where the product can be bought, and the queues are already forming - despite warnings that it is only available by appointment. Fans have flown from all over Europe to queue outside the boutique - one of only six high-end fashion stores worldwide to stock the gadget. This morning Australian Melanie Firbank was among the first globally to get her hands on the smart watch. Meanwhile, queues were forming in Berlin, Tokyo, and Hangzhou, Zhejiang province, China, with tech-fans eager to get snap up the new wearable.

Bettie Jo, from Houston, Texas, tipped the scales at 47 stone (660lbs) but found it difficult to lose weight without the support of her husband Josh, she reveals on tonight's My 600lb Life on TLC. The 24-year-old (right) was housebound and unable to tend to her own needs and lived off a diet of fried chicken. Bettie Jo, who now weighs 35st 8lbs (500lbs) thanks to surgery, reveals on the show that Josh (pictured with her left) had become her 'caretaker' - helping her go to the toilet and into the shower, and putting powder between her rolls of flesh afterwards to stop her skin from chafing.

18-year-old Remmie was left with a hazelnut-sized keloid scar on her ear after a bar piercing went badly wrong. The teen, who says she had hoped to stand out of the crowd, describes the scar as 'vile'. Now she has been forced to consult a cosmetic surgeon in a bid to have the lump removed - much to the horror of her mother Victoria who had asked her not to have the piercing done in the first place.

Vivienne Garton, 65, (right) was devastated her 10-year-old West Highland terrier Ben (left) was snatched from her garden in Knowle West, Bristol, earlier this month. She began an appeal to find him and put up posters near her home, but shortly after she received two phone calls from an anonymous man threatening to cut up her pet unless she paid £500. The caller gave the address of an empty house in Bristol and a phone number which she handed to police, who are now investigating.

With a base price of £5,500 ($8,200) a night the underwater suites - Poseidon and Neptune - at Atlantis, The Palm boast floor-to-ceiling views directly into the massive Ambassador Lagoon aquarium, creating the illusion of being under the sea. The views can be enjoyed from the bathroom (left), master bedroom (top right) and a living area (bottom right), and guests can even peer into their suite while scuba diving in the aquarium. Aquarium views are just one of the over-the-top features at a hotel that has become a symbol for extravagant luxury in the United Arab Emirates and a favourite of celebrities such as Kim Kardashian.

A series of images showing the heartbreak, brutality and horror of the Ebola virus as it tore through West African communities (pictured left) has taken the top prize at the world's largest international photography competition. The Sony World Photography Award winners were announced at a gala in London last night, where dozens of stunning photographs showcased people, communities and landscapes from around the world. Pictured top right is a pyrograph on Mount Kenya, while bottom right is a group of children playing football in one of the most dangerous neighbourhoods in Argentina.

Jeremy Clarkson (left), James May (centre) and Richard Hammond (right) were today pictured together for the first time since Clarkson was axed from the show - prompting speculation that they are planning their next career move. The three presenters held a three-hour meeting at Clarkson's home in west London this afternoon with Andy Wilman (inset, centre), executive producer of the BBC's hugely-popular motoring show. The meeting is likely to worry Corporation bosses, who now face the prospect of the hit TV show re-launching with a rival broadcaster. It came after May ruled out returning to Top Gear without Clarkson, insisting it would be 'lame' with a new presenter in place of his sacked co-host. He said the BBC would be 'stupid' to try a version of the programme with 'a surrogate Jeremy', Hammond and himself - adding that the idea was a 'non-starter'. His comments have raised the chances of the show returning next year with a completely new presenting team, given that both May and Hammond saw their contracts finish last month.

Former world squash champion Cassie Jackman and her husband Matt have two daughters who were born in Britain. But Matt, an Australian, had his returning resident visa application refused last month. Despite being widely acknowledged as the best ladies squash player in British history, Cassie and Matt have unwittingly fallen victim to immigration regulations for non-EU residents which mean they now have little choice but to stay in Australia.

The male contestants slaughtered the animal after two days without food, while the show's producers believed it was a more common species, only to later discover it was endangered. A spokesman for Channel 4, which produces the programme, said the island used, in Panama, was scouted out before the contestants were turned loose. While common caiman crocodiles were discovered, it was not known that the rarer American crocodile called the island home until after it was dead.

A second spectacular blast from the Calbuco volcano (inset) in southern Chile has covered nearby towns and villages in a thick layer of ash (pictured). Yesterday's dramatic explosion was the first time the active volcano had erupted in over four decades, shooting ash and smoke over six miles into the air. There are now serious fears the ash could contaminate water supplies and cause severe respiratory damage to locals. 4,000 people have already abandoned their homes in the cities of Puerto Varas and Puerto Montt, 18 miles away from the source of the eruption which one local described as 'an atom bomb'.

EXCLUSIVE: John Elder and Armin Wegner documented the suffering they saw, helping to build a case against a Turkish government which still denies the killing of up to 1.5million Armenians was genocide. As the world marks 100 years since the atrocities many Western governments including the US still do not use the word. Volunteer army medic Wegner used secret mail routes to sneak his images out but was caught by the German authorities and sent to a cholera ward.

Tipper Lewis, 43, from London, grew up on a farm and quickly became fascinated by the power of plants, Chinese medicine and organic produce, right. A vegan since the age of 18, she studied the power of herbs and plants at University and landed a job at Neal's Yard Remedies - the leading independent British retailer of organic natural health and beauty products. Speaking to FEMAIL about her love of superfoods, she said: 'I was taking them twenty years ago and they definitely weren't as fashionable back then but I've always loved them. 'People would laugh at me for having a bottle of green water on my desk at work but I just can't imagine living a different way. My healthy diet is definitely to thank for my energy levels.'

Kerrie Armitage, 28, from Leeds, suffers from the ultra-rare condition aquagenic urticaria - an allergy to water. She was diagnosed two years ago after her skin erupted in agonising blisters (right) when she got caught in a rain storm. Now the 28-year-old has had to stop kissing her husband Peter (inset) - because the saliva on his lips can trigger a painful flare-up. She said: 'Because his lips are wet, the saliva can make me react. He's got to make sure his lips are dry before he gave me a kiss. It's not every time - I can do the same thing time and time again and not react, but then I'll do it once more and get a flare-up.' Her condition has become so bad that her hugging her children can trigger an episode, as their body heat makes her sweat - and she has trained herself not to cry.

Researchers from the University of Utah tracked seismic waves from around 5,000 earthquakes to create a map of the earth beneath the Yellowstone National Park (pictured top left). Previous research discovered a smaller magma chamber (illustrated right and in red bottom left) indirectly beneath the surface, but this latest chamber (shown in yellow bottom left) sits 12 to 28 miles (19 to 45km) beneath the supervolcano and measures 11,035 cubic miles (46,000 cubic km). Around 98 per cent of the chamber consists of hot solid rock, while the rest is molten. This chamber is four times bigger than the magma chamber above it, but the study said the supervolcano is not posing any additional threat than it was before.

Futuristic technologies will revolutionise the way we holiday. Many futurists predict that space travel will become far more common and underwater hotels mainstream - in as little as 15 years.

In 19th-century America, 'escort cards' - not to be confused with the explicit sort you might imagine today - were handed to women by men who found them attractive. Collector Alan Mays has unearthed a treasure trove of these vintage ice-breakers, which bear phrases such as: 'May I be permitted the blissful pleasure of escorting you home this evening?' The cards used poetry and simple illustration (top right); and also made their intentions clear (bottom right).

Californian carpenter Kyle Toth placed a 45ft trunk in between the natural split of a tree and created what may well be the world's largest seesaw. Filming his creation, the young carpenter captures two users pumping their fists in celebration as they swing to a height of around 25ft.