Volunteers at the United Blood Services line up to give blood after 

Volunteers at the United Blood Services line up to give blood after a parade float carrying wounded veterans and their families was struck by a train Thursday, Nov. 15, 2012, killing four and injuring 17, in Midland, Texas. (AP Photo/Reporter-Telegram, James Durbin)
Associated Press
Volunteers at the United Blood Services line up to give blood after a parade float carrying wounded veterans and their families was struck by a train Thursday, Nov. 15, 2012, killing four and injuring 17, in Midland, Texas. (AP Photo/Reporter-Telegram, James Durbin)
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