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. Last Updated: 07/27/2016

Gunman Kills NASA Co-Worker

HOUSTON -- A mediocre job review led a space engineer to buy a gun, then kill a co-worker he blamed for the appraisal and himself at NASA's Johnson Space Center, police said.

The engineer, Bill Phillips, 60, left rambling notes saying his victim, David Beverly, called him stupid. He exacted his revenge by gunning him down in their NASA offices on Friday.

"You're the one that's going to get me fired," police quoted Phillips as saying before he shot Beverly, 62, in the leg and chest.

As police closed in, they said Phillips shot himself in the head.

The incident, coming on the heels of Monday's shooting rampage at Virginia Tech university that left 32 people dead, again raised the issue of U.S. gun violence and prompted NASA to review its security measures.

"We will be looking at yesterday's events to see if we can improve the security for our employees out here," space center director Michael Coats said Saturday at a news conference.

His boss, NASA Administrator Michael Griffin, said little could be done if someone is bent on revenge at any cost.

Friday's shooting follows the February arrest in Florida of astronaut Lisa Nowak on charges that she assaulted a woman she viewed as her romantic rival for another astronaut.

Both incidents raised questions about whether NASA, which is trying to finish the international space station by 2010, is putting too much stress on its employees.