Reports until 10:53, Thursday 17 September 2015
LHO General
patrick.thomas@LIGO.ORG - posted 10:53, Thursday 17 September 2015 (21623)
Helicopter flyby 
17:17 UTC Heard what turned out to be a helicopter flying overhead. Gerardo says he saw it come within half a mile of end X. We were in observing mode.