Monday was the deadline for plans to be submitted for a memorial at the site of the former World Trade Center. “By the 5 p.m. deadline, thousands of proposals, enough to fill a caravan of delivery trucks, had been received at the nondescript, six-story warehouse at 515 West 36th Street in Manhattan. Entries started being accepted on June 9, and the last ones trickled in for more than an hour after the deadline. The contest is expected to be the largest design competition ever, exceeding even the 1,421 designs submitted for the Vietnam Veterans Memorial. Little more is likely to be heard about the proposals until September, when about five finalists are to be announced.”