NASA's Space Operations chief, William Gerstenmaier, says the agency continues to learn from its mistakes.

宇航局航天工作负责人葛斯坦麦尔说，宇航局正在不断从过去汲取经验。

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"What we're asking (SpaceX officials) to do is amazing, " William Gerstenmaier, head of NASA's manned space-flight efforts, told reporters recently.

WSJ: SpaceX's Pioneering Flight Plans

Crane has a long history covering innovation, interviewing SpaceX and Tesla CEO Elon Musk, famed futurist and Google's director of engineering Ray Kurzweil, and NASA's William Gerstenmaier.

CNN: CNN Profiles - Rachel Crane - Correspondent

In his interview two weeks ago, Mr. Musk recalled that William Gerstenmaier, NASA's top manned space official, raised questions about whether additional testing was necessary.

WSJ: SpaceX Acts Fast for New Launch