President Barack Obama delivers his historic inaugural address today. Obama is already known to be capable of giving a great speech. Obama's speech is expected to run about 15-20 minutes, which is short compared to most inaugural addresses. The main theme will focus on "responsibility."
Watch live coverage of the Inauguration all day Tuesday beginning with "Good Morning America" at 7 a.m. ET and go to the Inauguration Guide for all of ABC News' coverage details.
