NASA Official Says Nowak Showed No Signs of Instability

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A top NASA official says astronaut Lisa Nowak had shown no signs of instability before her arrest this week.

Nowak returned to Johnson Space Center in Houston yesterday following her arrest in Orlando, Florida -- where she's accused of attempted murder and attempted kidnapping. Her alleged target was a woman she saw as a rival for the affections of a space shuttle pilot.

NASA deputy administrator Shana Dale says the space agency will now look at its psychological screening process for astronauts -- and also at whether Nowak showed any problems in her dealings with other astronauts.

Officials at the space agency aren't commenting on whether the arrest means the end of Nowak's NASA career. But they say it won't have a long-term impact on the space program.