How do you make an hour-and-a-half long movie about an incident that only lasted a few minutes? Clint Eastwood finds out in his adaptation of the 2015 Thalys Train Attack, “The 15:17 to Paris”. — O n August 21st, 2015, aboard a train that was travelling from Amsterdam to Paris, three American men thwarted a Moroccan man’s attempt to hold its passengers at gunpoint. The perpetrator, Ayoub El Khazzani, 25, was armed with over 300 rounds of ammunition, and claimed robbery was his intent, not…