Obama Challenges McCain on Iraq Stroll

Barack Obama on Tuesday challenged Republican White House rival John McCain for using a heavily guarded trip to a Baghdad market as evidence that Iraq's security is improving.

"The idea that the situation in Iraq is improving because it takes a security detail of 100 soldiers, three Black Hawk helicopters and a couple of Apache gunships to walk through a market in the middle of Baghdad is simply not credible and not reflective of the facts on the ground," Obama said in a taped interview that will air as part of a Democratic presidential forum sponsored by MoveOn.org.