Anubis
No Lifer
They said 6 miles, but the way they phrased it (everything in 6 miles will be dead) made it sound like a diameter more than a radius, so I was assuming a radius of 3 miles. However, the timer is clearly below one minute before the Batwing even leaves the city, and the blast radius doesn't come within 10 miles of the city. It also never shows the Batwing plunging into the ocean, although that would certainly reduce the blast radius. But for comparison sake, here's a nuke detonated underwater from 3 miles back:
That's a whole hell of a lot bigger than what the people were looking at in The Dark Knight Rises. And keep in mind that when a nuclear bomb is detonated under water, there is no mushroom cloud, just a plume of water vapor which descends after a few moments like a geyser. The Dark Knight Rises showed a clear mushroom cloud of smoke and flame which is not consistent with an underwater detonation, so I'm guessing the intent was that the bomb went off above the water. So he still managed to get it at least 10 miles in less than a minute. And he had to program the autopilot, unless he had been counting on the "fly a nuke out to sea scenario" from the get-go, which is plausible given what he knew. Certainly more plausible than lots of things in the film... But it's Batman so who cares?
crossroads (baker) was only 23 kilotons, the one in batman was 4 mega tons, pretty massive difference there
however about the auto pilot crap, the shot of him looking at the horizon does not have to be chronologically directly before it goes off. blah blah blah suspension of believe blah blha blah
they should have said Mr Grayson - not really sure how that one got past the editing floor
most other issues have already been pointed out but overall its a good movie