[Cementjungle]

That’s what the backpack full of TATP was for.

That's what they had? Good thing they didn't manage to gain entry to the event.

[DBrow]

“That’s what they had?”

Just guessing. C4, TNT, Semtex won’t detonate if hit with a supersonic round. TATP will, supersonic or no. Tannerite will too, it depends on formulation if a .22 or a .223 makes it go.