April 5, 2012 9:16 am Needless Medical Tests Nine medical groups are asking doctors and patients to think twice before ordering dozens of common treatments and practices. US & World Videos 0:47 WATCH: Comet fragment lights up the sky in Portugal 1:58 ICC seeking arrest warrants for Israeli and Hamas leaders 1:43 World reacts to death of Iran's president 1:07 Cargo ship that crashed into Baltimore bridge moving back to port 0:33 Man steals school bus near Tampa, then drives it to Miami: FHP