Two weeks ago, a soldier returned to the United States from active duty in a combat zone. The soldier was diagnosed with post-traumatic stress disorder (PTSD). Which comment by the soldier requires the nurse's immediate attention?

"I want to continue my education, but I'm not sure how I will fit in with other college students."

"It's good to be home. I missed my home, family, and friends."

"Sometimes I think I hear bombs exploding, but it's just the noise of traffic in my hometown."

"I saw my best friend get killed by a roadside bomb. I don't understand why it wasn't me."