Photographers work on their remote cameras as the SpaceX Falcon 9 test rocket is being prepared for a second launch attempt from Space Launch Complex 40 at the Cape Canaveral Air Force Station in Floriday on Monday. Michael Brown/Reuters
How One Faulty Nitrogen-Purge Valve Forced SpaceX to Abort -- Autopia
SpaceX has replaced a faulty valve that led to the aborted launch attempt early Saturday morning and is currently planning a second launch attempt at 3:44 a.m. EDT Tuesday, May 22. The first launch attempt was unsuccessful after a last-half-second shutoff occurred due to higher than acceptable pressure in the combustion chamber of one of the Falcon 9′s Merlin rocket engines.
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Update: SpaceX Will Try 1st Private Cargo Run Again Tues. -- ABC News/AP
My Comment: As for the launch, it will be carrying one VIP.