Since I was in Moscone West on Tuesday at Seybold this hits particularly close to home, especially on 9/11.
Bomb scare empties Moscone Center
The person, who authorities believe has made similar threats in the past, contacted the convention center about 1:20 p.m. saying a bomb had been hidden “in a dark place” and was due to go off in an hour. The caller said the bomb had been planted in retribution for bloodshed in Iraq and Afghanistan, said San Francisco police spokesman Dewayne Tully.[SF Gate]