Here is a 72-byte alphanum MD5 collision with 1-byte difference for fun:
md5("TEXTCOLLBYfGiJUETHQ4hAcKSMd5zYpgqf1YRDhkmxHkhPWptrkoyz28wnI9V0aHeAuaKnak")
=
md5("TEXTCOLLBYfGiJUETHQ4hEcKSMd5zYpgqf1YRDhkmxHkhPWptrkoyz28wnI9V0aHeAuaKnak")
September 11, 2001, 9:45 am: The FAA closed U.S. airspace — the first unplanned closure of U.S. airspace in history. In just a matter of hours, all commercial air traffic was grounded.
#September11