NASA moon rocket hits new problem, delays trip to Apr.
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A United Launch Alliance Vulcan rocket carrying classified Space Force payloads suffered a booster problem but apparently made an otherwise "nominal" ascent to space, the company said.
SpaceX halted Falcon 9 launches for a week while it investigated that issue, which was traced to a fuel leak in one of the booster's nine Merlin engines. This leak led to a fire shortly after touchdown, which weakened a landing leg and caused the vehicle to tip over.