Sgt. Angela Peacock is seen in 2004, after she returned to the United States from duty in Iraq.

Thom Patterson

CNN

When Iraq war veteran Angela Peacock is in the shower, she sometimes closes her eyes and can't help reliving the day in Baghdad in 2003 that pushed her closer to the edge.

While pulling security detail for an Army convoy stuck in gridlocked traffic, Peacock's vehicle came alongside a van full of Iraqi men who "began shouting that they were going to kill us," she said.

One man in the vehicle was particularly threatening. "I can remember his eyes looking at me," she said. "I put my finger on the trigger and aimed my weapon at the guy, and my driver is screaming at me to stop."

"I was really close to shooting at them, but I didn't."

Now back home in Missouri, Peacock, 30, is unemployed - living in a friend's home in North St. Louis County without a lease and paying minimal rent.

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