I watched Olympus Has Fallen on Netflix, it's a rip off of Die Hard. It really is Die Hard in the White House without Bruce Willis.
Also, it didn't make any sense, some North Koreans seize the white house and take the president and other key members of government hostage. Their demands and for the US to withdraw from the Korean DMZ and pull back one of the fleets we have in the region.
The Speaker of the House (Morgan Freeman) takes command and is prepared to give into these demands in exchange for the Presidents life. This would never happen in real life. We wouldn't allow South Korea to be overrun just to save the lives of a handful of politicians, even if one of them is the President.
The movie has some decent action, but it's nothing you haven't seen before. I gave it a 4/10 on imdb.