Are pigs flying and I just don’t know it? David Letterman married is longtime girlfriend Regina Lasko last Thursday. Letterman made the announcement himself during Monday’s taping of the “Late Show.” “On Thursday, at 3 p.m., March 19, 2009, at the Teton County Courthouse in Choteau, Montana, I was married to Regina Lasko,” Letterman said about 20 minutes into the show, before he read the “Top 10″ list. “Regina and I began...