compulsive liars

Why is the US military incapable of telling the truth?

"Contrary to public statements by the U.S. military, four U.S. soldiers did not die repelling a sneak attack at the governor’s office in the Shiite holy city of Karbala last week."

There is a huge difference between dying as you defend a governor and being kidnapped and executed 25 miles away. It's not like they just got the facts a little bit wrong, they got them completely wrong. Are they even capable of telling the truth?