At one point my technical interviewer (and soon-to-be supervisor), Jerry, looked me square in the eye and said, "You realize you'll be making parts that kill people, right?"

To this day it still bothers me that I took the job, but I really needed it at the time so I justified it out: someone else would make them anyway, and besides, I wasn't the guy giving the orders.

There was a news report a while back that a Hellfire missile had been used to kill some number of people in Afghanistan. It's likely, given the timeframes involved, that I made sure that at least one of the parts on that particular missile functioned correctly.