especially the powerless and helplessness of the people in the embassy when the terrorists overrun the walls and another scene where a group of hostages are taken to a room and have a gun to their head threatened with execution. There is not a lot of actual violence but the threat of violence is what is so disturbing. There is also some profanity including a running joke of saying "ARGo Fuck Yourself".
But nothing a 13 year old can't handle. I don't recall any sex/nudity/gore or other hard-R type objectionable material.