Norman tornado: April 13, 2012 16/20

A gas company employee approaches a leaking meter after damage from a tornado struck the west and central parts of town Friday, April 13, 2012, in Norman, Okla. In an unusually early and strong warning, national weather forecasters cautioned Friday that conditions are ripe for violent tornadoes to rip through the nation from Texas to Minnesota this weekend. (AP Photo/The Oklahoman, Steve Sisney) TABLOIDS OUT ORG XMIT: OKOKL106