The inauguration was held inside for the first time since 1985 due to below-freezing temperatures in the nation's capital. With wind chill, the temperatures are as low as the teens. The arena has a capacity of 20,000 people — but there have been many more tickets distributed than that, meaning not everyone lined up will be able to get inside.

Some looking to attend the presidential parade inside Capitol One Arena in Washington, D.C., had to make a tough choice when they got to the security checkpoint outside: Ditch your bag, or lose a shot at seeing the presidential parade.