Nasa concluded that the failure of the micrometeoroid shield 63 seconds into the flight caused the breaking of the solar array system. Furthermore, at 593 seconds into the flight the second stage retro rocket plume exhaust resulted in the ripping off of the array.
Having two rockets stacked on pads 39A and 39B at the same time made for quite a sight at the Kennedy Space Center. There were also two firing rooms at KSC’s Launch Control Center that would control the countdowns for both rockets simultaneously.
The biggest concern before Apollo 9 was the docking maneuver.In early 1969, at NASA there was little confidence in the docking system. At a January program review, Phillips said that problems encountered during probe and drogue testing worried him…
The Command Module probe and the Lunar Module Drogue
McDivitt & Schweickart practice in the LM simulator
Schweickart in the spacesuit with the backpack
Lithograph print of the negative that flew on Apollo 9, with signatures of Grumman engineers and mechanics