 Complete the following phrase:  STS-127s fifth launch attempt, on 13 July 2009, was also scrubbed due to anvil clouds and lightning within of the launch site, which violated launch safety rules. STS-127 finally launched successfully on its sixth launch attempt, on 15 July 2009 at 18:03 EDT. Pieces of foam were observed falling off of the External Tank during the ascent, the same occurrence that had led to the 