I agree with Star Wolf that Olympus Has Fallen has the better Terrorist takeover the White House scene.
You got a captured AC-130 attack aircraft taking out the snipers on the White House rooftop and softening up the place so that the Korean commandos can blast their way through the gates. The Secret Service launched a counter attack but the Korean commandos were expecting that and used heavy machine gun fire and RPG attack at the U.S counter attack and the counter attack failed as a result.
Then you had those huge modified garbage trucks parked right outside the White House gate, complete with heavy machine guns, to prevent U.S reinforcement from reaching the White House during the critical capture phase. It was an excellent and well planned scene.
The only problem that i had with the scene, is that the entire South Korean prime ministerial security team turned out to be North Korean agents. In the movie, the South Koreans did a very shitty job of screening the agents who protect their Prime Minister. Even the sole white guy in the South Korean security team, Dylan McDermott, was working for the North Koreans !