SpaceX Falcon Heavy launch from Kennedy Space Center

53 minutes:	The SpaceX launch director checks the “go” for the propellant load.
50 minutes:	Loading of first phase of rocket grade kerosene begins.
45 minutes:	The first phase of liquid oxygen loading begins.
35 minutes:	Loading of second phase of rocket grade kerosene begins.
18½ minutes:	The second phase of liquid oxygen loading begins.
7 minutes:	Falcon Heavy engine starts cold.
59 seconds:	The flight computer was ordered to begin final pre-launch tests.
45 seconds:	The SpaceX launch director checks the “go” for the launch.
20 seconds:	The propellant tanks pressurize the aircraft.
6 seconds:	The engine controller commands the engine to start the ignition sequence.
0 Seconds:	Falcon Heavy Liftoff.