Hosted by Jane Pauley. In our cover story, Ted Koppel investigates White House directives, granting vast powers to the president, that are so secret even Congress cannot see them. Plus: Erin Moriarty looks at the unprecedented demand for absentee ballots; David Martin looks back at the failed 1980 hostage rescue mission in Iran; Mark Strassmann visits Nashville's Ryman Auditorium, the "Mother Church of Country Music"; Lee Cowan examines how the NBA, Tyler Perry, and some Virginia families are working hard to keep social bubbles from bursting; John Dickerson sets the stage for this week?s unconventional Democratic National Convention; Jane Pauley talks about recognizing signs of depression; and Nancy Giles shares the cool story behind the invention of popsicles.