How likely is it going to be, for 1.5million people to gather for President Obama’s inauguration?
Who can say? IMNSHO the crowd will be a bit smaller, but around the same order of magnitude. Check what Clark McPhail, professor emeritus of sociology at the University of Illinois at Urbana-Champaign had to say a few years back to Salon.com:
The counting formula divides the mall into eight panels and measures the square footage of each. For really huge [gatherings], aerial photographs are necessary to determine how much space is occupied […] A crowd of 500,000, he says, would [fill] all eight panels, stretching from the Capitol Building to the Lincoln Memorial, or from Third Street to 14th Street […]
It is therefore not too much of a stretch of one’s imagination to think of a million people in the Mall on January 20, 2009.