WASHINGTON (AP) — Michelle Obama is teaming up with TV's Tim Gunn to honor some of the nation's top designers — including the creators of popular computer fonts and Swiffer floor-cleaning products — at the White House. The first lady hosts a luncheon Tuesday to honor winners of the 2011 National Design Awards. The awards are presented by the Smithsonian's Cooper-Hewitt National Design Museum in New York City. Earlier Tuesday, Gunn of "Project Runway" fame will host a teen design fair at the Smithsonian to introduce Washington high school students to careers in design. This year's design award winners include...