FILE - In this Sept. 10, 2010, file photo FAA Administrator Randy Babbitt talks about proposed rules to help prevent dangerous pilot fatigue at the Transportation Department in Washington. Babbitt has... more 
FILE - In this Sept. 10, 2010, file photo FAA Administrator Randy Babbitt talks about proposed rules to help prevent dangerous pilot fatigue at the Transportation Department in Washington. Babbitt has decided to end the practice of single-staffing some towers where traffic is light between midnight and 6 a.m. The change was in response to at least four incidents, including this April 2011, in which controllers fell asleep on duty. less 
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Associated Press | Photo By Alex Brandon, File
Sat, Apr 16, 2011 2:59 PM EDT