Mark Englert was a 30-something business consultant from Connecticut living a couple of blocks from the World Trade Center in Manhattan on Sept. 11, 2001. He had just returned from a jog on that blue-sky morning when the first plane hit.He heard the explosion, but he had no idea what it was. He raced to his apartment window and all he could see on the street below were people looking up and pointing.One of the towers was on fire, he heard. Something about an airplane.Seventeen minutes later, a second plane streaked almost directly overhead and slammed into the other tower....