The size of the crowds was vastly underestimated. Far more important than pretzels and water were toilet facilities.
Thousands of people were in line to the hundreds of portable toilets and thousands more lined up to go through the museum's metal detectors to get to the museum's toilets.
I met some people who had gone to one of the museums and they said the guard was overwhelmed because he had been told to expect only 6 or 7,000 people for the Tea Party! LOL!