[Loyal Buckeye]

This was a trial run to prove they could drop bombs and still have time to get away.

It could also be for the head terrorists to demonstrate that the grunt terrorists can really, really, really trust the head terrorists not to set of the bombs prematurely and blow up the grunt terrorists.

[Enterprise]

"It could also be for the head terrorists to demonstrate that the grunt terrorists can really, really, really trust the head terrorists not to set of the bombs prematurely and blow up the grunt terrorists."

I like that point of view. Suppose, just suppose, that the July 7 bombings was something along the lines of this: "here kid, take this package and leave it on the bus. When you get a block away, we'll set it off."

[TASMANIANRED]

Same thing, different phrasing.

One way or another it looks most like a training exercise.