30 Million Patriots on the Mall

So I went into DC today to see what 30 million people looked like. I was on the Mall for Obama's first inauguration along with 2 Million other people. At the inauguration, the sea of people was wall-to-wall from the Capitol to the Washington Monument and with the crowd scattered all the way back to the Lincoln Memorial. So I thought this would be, by far, the largest human gathering in the history of the planet, with the crowd blanketing the city and extending all the way to the Pentagon. However, it appears that the bulk of the projected attendees went, instead, to the Mall of the Americas, because they certainly did not show up in DC.