Lise Pedersen French director Flore Vasseur has opened up about her journey from high-flying entrepreneur in New York City to filmmaker whose feature debut “Bigger Than Us,” co-produced with Marion Cotillard, premiered at Cannes’ new sidebar dedicated to climate change.It all started when the then 24-year old Vasseur witnessed the 9/11 attacks from her office in NYC.“It was one of those life-changing moments, it tears away everything you believe, everything that you are.