Fleshing out flash mobs

Had the tips never come in about new "threats" during Carmageddon, police may never have known until it was too late.C.J. Lin in the Daily News.

Out in full view of the public, but buried somewhere in the mountains of chatter on Twitter, a flash mob was planning to form on the shuttered Mulholland Bridge, half of which was being torn down to make room for a car-pool lane on the 405 Freeway.

At the same time, there was some tweeting about a group of bicyclists planning to take a joy ride on the freeway while it was closed the weekend of July 16-17.