The @BoeingSpace #Starliner that just arrived at the @Space_Station on a test flight is carrying over 500 lbs (227 kg) of cargo & crew supplies.

Watch live on Sat., May 21 starting at 11:30am ET (15:30 UTC) as astronauts open the spacecraft's hatch: https://t.co/a6c1WZaQAJ https://t.co/cJFeCAnwvo