Maybe someone trained one on the bomb but the escape part of their op was pure fubar. They had to knock over a 7-11 to get money to escape. A competent crew would have monies, transport, and options in place. A competent well trained crew would not have paraded their faces under 1000s of cameras and then panicked when their faces were on every tv in the world. The actual bomb and plan was good, but one of the bombs went off light. The staggering of the detonations was good as was the use ofshrapnel aimed to maim. All that made one think of comtetent terrorists, but what followed was rank amateur behavior.
I think their ride out of town or means via cash or a vehicle for getaway purposes was the guy with the burned hands and the fat wallet who is going home next week/being deported- I think he left them hanging out to dry...they had no money and no car-they had to have had a getaway plan but something went wrong-
just my 2cents
They didn’t knock over a 7-11. That’s where the owner of the SUV got away and ran into a 7-11 to call the cops.