Fame
Sorry, but this isn't really a job that will get you famous. Your job is to lay low, drive the rig, and protect the nuclear materials if need be. There's not really an opportunity for your story to be picked up by VH1. Besides, federal agents typically are focused on protecting our country. There's really no room for press conferences and limelight.
If anything, it's important for most federal agents to keep a low profile; that way, when bad things happen and sticky situations arise, their families and friends remain safe.