SpaceX has positioned a Falcon 9 rocket on its launch pad at Cape Canaveral for a hold-down engine firing today. The launcher is set to blast off May 31 with the SES 12 communications satellite. https://t.co/aMtKkOyKoe pic.twitter.com/nFEP6XLfPd

— Spaceflight Now (@SpaceflightNow) May 24, 2018