This next statement is an outright LIE:
"Both Air Flight Service and The Chronicle examined the photo survey and independently arrived at the estimate of 65,000 marchers at the time the photographs were taken, a figure supported by public transportation statistics."
BART reported and extra 150,000 marchers that Sunday and there was no ball game anywhere. Those extra folks were going to the march. That's why they had to run extra trains. Others took buses or drove; others live in the city.
This kind of arithmetic reminds me of that old joke: "Why are women so bad at math?" (Now hold your thumb and index finger a few inches apart and say...) "Because all their lives they've been told that this is eight inches." And, for the record, in the case of the virile member, size does not matter....except that too big hurts.
Joanna