OK, then they are extraordinarily incompetent, then... they were right next to the bombers and site of bombing and did nothing to prevent it or help the wounded.
But at least they looked good in the not-uniform-uniforms.
Incompetent because they didn't stop the bombing?
Please, inform us of how they could have stopped it.
Protip: even with high amounts of security, these things can't be stopped all the time. Isn't that what we always tell the antis about gun control?
How do you know they didn't help the wounded? How do you have any info whatsoever of their actions during and after the attack?
My HMMWV got blown up while I was on route clearance duty. Does that mean I'm incompetent because we missed one IED out of many many more that we found?