Proof

AP:

McCain said the Republican congressional delegation he led to Iraq drove from Baghdad's airport to the center of the city, citing that as proof that security was improving in the capital. Prominent visitors normally make the trip by helicopter.
The delegation was accompanied by heavily armed U.S. troops when they were not in the Green Zone, site of the U.S. Embassy and Iraqi government. They traveled in armored military vehicles under heavy guard.
... Underscoring security concerns, [U.S. military spokesman Rear Adm. Mark] Fox said two suicide vests were found unexploded Saturday in the Green Zone, less than a week after a rocket attack killed two Americans in the vast central area.

Some security.