Watch: Gerard Butler Battles For Britain In New Trailer For 'London Has Fallen'

Two years ago, there was a multiplex showdown between two very similar vehicles: Gerard Butler's "Olympus Has Fallen," and Channing Tatum's "White House Down." Both movies centered on terrorist attacks on the White House Down, and the gritty, heroic agent who saved the day, but only one had enough juice to justify a sequel. Even though 'Olympus' only made $161 million worldwide versus 'Down' which hauled in $205 million,  it was made for considerably less — $70 million versus $150 million. And so, it's Butler who's going on to save the day — again.

READ MORE: Watch: Gerard Butler Takes On Terrorists In First Trailer For 'London Has Fallen'

This time around, Mike Banning is going to jump into action when London gets blown up real good, and a plot to assassinate world leaders is uncovered. This may not be the smartest movie to ever be made, but you have to admit, that' a pretty chewy B-movie premise. Here's the official synopsis: 

London Has Fallen...