Bush expresses sorrow over U.S. deaths in Iraq

By David Alexander and Paul Eckert

WASHINGTON (Reuters) - President George W. Bush expressed sorrow on Monday as the number of U.S. troops killed in Iraq hit 4,000, days after he marked the fifth anniversary of the unpopular war.

"One day people will look back at this moment in history and say 'thank God there were courageous people willing to serve' because they laid the foundation for peace for generations to come," Bush said after a roadside bomb killed four U.S. soldiers, pushing the toll to the new milestone.

Recent opinion polls show around 60 percent of U.S. voters disapprove of Bush's handling of the war and roughly the same number believe the loss of American life was not worthwhile.

Last week, on the fifth anniversary of the U.S.-led invasion, the Republican president said the United States was on track for victory.

Democratic presidential contenders Barack Obama and Hillary Clinton praised the heroism of U.S. troops while promising that if elected they would come home.

Obama said the war should never have been waged and troops should be brought home soon. Clinton pledged to respond "by bringing a responsible end to this war, and bringing our troops home safely."

Presumptive Republican presidential nominee John McCain, who has said U.S. troops could remain in Iraq for 100 years, told a veterans' group in Chula Vista, California, that his thoughts and prayers go out to families of troops killed in the war "every day, not just on the day that 4,000 brave young Americans are sacrificed."

After a State Department briefing with Secretary of State Condoleezza Rice, Bush, who will leave office in January, offered words of comfort for the families of the troops killed in Iraq.