A massive security operation has already begun to take over the capital for the most heavily guarded inauguration in history. The military has deployed anti-aircraft missiles inside the city. D.C. police plan to erect roadblocks and screen pedestrians around an area covering more than 100 square blocks in the center of Washington. On Tuesday several downtown blocks had to be evacuated after a man threatened to blow up his van parked near the White House. The matter ended peacefully after a four hour standoff.