Their 2002 Super Bowl after 9/11 was one of the two best performances, along with Prince in the rain.
Yeah, I watched a short documentary last night as well on Youtube covering the 2002 halftime show. U2 only played three songs: Beautiful Day, MLK, and Where the Streets Have No Name. Kurt Warner talked about walking out to catch the end of the the final song during which they had a large screen projecting the names of those who died on 9/11, and how it moved him. It was 17 years ago, and also featured the Patriots, with Tom Brady, beating the Rams. Bono noted that they play Where the Streets Have No Name whenever they need to bring G-d into a room.
The 2015 Paris concert is freely available on Youtube. The performance of "One" at the end is hauntingly beautiful.