Who are the four astronauts of NASA’s SpaceX Crew-12 mission to the International Space Station?

NASA's SpaceX Crew-12 mission is manned by a international group of four astronauts who will spend 8 months in space on the ISS conducting experiments.

Watch NASA SpaceX Crew-12 launch: mission to ISS is go

Follow the four astronauts and mission control as they combine for lift off ahead of trip to the International Space Station.