Gen. David Petraeus has arrived on Capitol Hill. He is due to begin his testimony in 10 minutes.
Back in Baghdad, Iraqi Prime Minister Nouri al-Maliki told parliament that his country's military is not ready to assume responsibility for internal security. "There have been tangible improvements in security in the recent period in Baghdad and the provinces but it is not enough," he told fellow lawmakers, according to the Associated Press.
USA TODAY's David Jackson reports that the Iraqi leader made similar comments during a conversation this morning with President Bush.
White House spokesman Tony Snow says Maliki reported a "change in attitude" among the political factions in Iraq, but he couldn't say when they might reach a consensus on the allocation of oil revenues or provincial elections.
Nancy Youssef of McClatchy Newspapers has been writing a blog from inside the hearing room.
Update at 12:39 p.m. ET: Armed Services Committee Chairman Ike Skelton, D-Mo., is welcoming the witnesses and discussing the "devastating cost" that the United States would pay if it was forced to engage in another conflict while the military was engaged in Iraq.
"The surge is just the latest in a long line of operations," Skelton says. "It, frankly, looks like as if there has been technical progress in the security area. We should, at this point, temper any enthusiasm with the caveat that this is Iraq. Nothing has been easy there."
Update at 12:50 p.m. ET: House Foreign Affairs Committee Chairman Tom Lantos, D-Calif., says Petraeus and Crocker were sent to the Hill to "restore credibility to a discredited policy."
"The administration's myopic policies in Iraq have created a fiasco," he adds.
Update at 12:59 p.m. ET: Rep. Duncan Hunter, R-Calif., a former chairman of the Armed Services Committee, used his opening statement to defend Petraeus against what he described as "major attacks" against the military officer's credibility. He pointed to the anti-war group's advertisement in this morning's editions of The New York Times.
Hunter says he looks forward to hearing a "candid independent assessment given with integrity."
Update at 1:12 p.m. ET: MoveOn.org is getting lots of free publicity. So far, two GOP lawmakers have mentioned the group and its anti-war advertisement during today's hearing on the war.
"I urge my colleagues on both sides of the aisle to publicly denounce that ad that says you are cooking the books for the White House and to apologize to you, Gen. Petraeus, for casting doubt on your integrity," says Rep. Ileana Ros-Lehtinen, R-Fla.
Update at 1:17 p.m. ET: Petraeus tried to speak, but his microphone didn't work.
Update at 1:21 p.m. ET: Protesters were just removed from the hearing room, according to CNN. "Any signs or demonstrative evidence will cause your removal," Skelton tells the audience.
Update at 1:32 p.m. ET: The commander began his statement with a response to allegations that he would be regurgitating White House talking points. "I wrote this testimony myself. It has not be cleared by, nor shared with, anyone in the Pentagon, the White House or the Congress," he says.
Update at 1:34 p.m. ET: He says the most significant development in recent months has been the tribal rejection of al-Qaeda that began in Anbar and has spread to other areas.
"I believe that we will be able to reduce our forces ... by next summer without jeopardizing the security gains that we have fought so hard to achieve," he says.
Update at 1:44 p.m. ET: Petraeus is going over a series of charts that he says show progress in the fight against Shiite militias and al-Qaeda in Iraq. We'll post links to the charts when they become available.
Update at 1:54 p.m. ET: Petraeus says he expect to "redeploy without replacement" a number of units in the coming year, leaving the coalition with 15 brigade combat teams in mid-July 2008. He cautions that trying to predict things too far into the future, especially in Iraq, can be "misleading and even hazardous."
Update at 2 p.m. ET: The general, who holds a doctorate from Princeton, offers a good summary of his testimony: As a bottom line up front, the military objectives of the surge are, in large measure, being met. In recent months, in the face of tough enemies and the brutal summer heat of Iraq, Coalition and Iraqi Security Forces have achieved progress in the security arena. Though the improvements have been uneven across Iraq, the overall number of security incidents in Iraq has declined in 8 of the past 12 weeks, with the numbers of incidents in the last two weeks at the lowest levels seen since June 2006.
He attributes this to the coalition's ongoing efforts against the Shiite militias and al-Qaeda in Iraq. He says they've "helped reduce ethno-sectarian violence."
We have a copy of his prepared statement.
Update at 2:05 p.m. ET: Protesters have disrupted the hearing on at least three separate occasions. During the most recent incident, two women in pink started yelling and screaming and then refused to leave the hearing. Uniformed Capitol Police officers had to drag them out of the room.
"This is intolerable. I will not allow it," Skelton says. Within seconds, another woman started to holler.
Update at 2:19 p.m. ET: Crocker is testifying about the political aspects of the conflict in Iraq.
"I do believe that Iraq's leaders have the will to tackle the country's pressing problems, although it will take longer than we originally anticipated because of the environment and the gravity of the issues before them," Crocker says.
We have a copy of his prepared statement.
Update at 2:26 p.m. ET: Crocker says the electric supply is "woefully inadequate" in Baghdad.
Update at 2:34 p.m. ET: The veteran diplomat offers a nuanced assessment of the likelihood of future progress. "I cannot guarantee success in Iraq. I do believe, as I have described, that it is attainable," he tells the committees.
Here are some of the charts that Petraeus pointed to during his testimony:
Update at 2:49 p.m. ET: Crocker was asked about the prospect of expanded dialogue with Iran and Syria. The ambassador says he hasn't seen any signs that suggest Tehran is interested in "doing serious business."
"I found no readiness on the Iranian side at all to engage seriously on these issues," Crocker says. "The impression I came away with after a couple of rounds is that the Iranians were interested simply in the appearance of discussions, of being seen to be at the table with the U.S. as an arbiter of Iraq's present and future rather than actually doing serious business."
Update at 3:13 p.m. ET: The Hill is reporting that Cindy Sheehan, a high-profile anti-war activist, was among those arrested at today's hearing.
Update at 4:26 p.m. ET: Sgt. Kimberly Schneider of the U.S. Capitol Police tells USA TODAY that 10 protesters have been arrested today in or near the hearing room.
Not sure if this is news, but Petraeus says about 80% of the suicide bombers are thought to be foreign fighters. He says some of the neighboring countries have been taking steps to keep military-age males from traveling to Iraq via Syria.
Update at 5:45 p.m. ET: Rep. Mac Thornberry, R-Texas, noted the discord in Washington and asked Crocker how the embassy in Baghdad can get Iraqi elected officials to compromise and reach agreements on the issues that divide them.
"Tthe real answer, of course, is you can't compel it. People have to see their interest served by a process of accommodation. And that's what were' seeing at least the hopeful beginnings of," Crocker says. He finds "cautious encouragement" in the lawmakers who came together this summer to work their way through "a lot of the major issues."
Update at 6:46 p.m. ET: The hearing's over. Speaker Nancy Pelosi, D-Calif, writes on her blog that continuation of the current policy in Iraq is "simply unacceptable."
"The President’s strategy in Iraq has failed. It is time to change the mission of our troops to one that will promote regional stability and combat terrorism, so that the numbers of our brave men and women in uniform in Iraq can be reduced on a much more aggressive timetable than the one outlined today by General Petraeus," she writes.
(First photo taken Susan Walsh, AP; Second photo by Jason Reed, Reuters; Third photo taken in Iraq by David Furst, Getty Images; Fourth photo by Tim Sloan, AFP/Getty Images; Fifth photo by Karen Bleier, AFP/Getty Images; Sixth photo by Chip Somodevilla, Getty Images.)