On Monday, “Good Morning America” hit a rare TV milestone: 50 years on the air. To celebrate, ABC News brought out an all-star cast: Many of the show’s former anchors, Diane Sawyer, David Hartman, Charlie Gibson, Joan Lunden, Kevin Newman, Lisa McRee and Nancy Dussault, who will toast the occasion with the trio now holding down the anchor desk: Robin Roberts, George Stephanopoulos and Michael Strahan. Roberts and Stephanopoulos are now the longest-running anchor duo in morning TV, having first been paired up in 2009. Strahan joined them in 2016. The result has been a hit, with GMA now holding down 14 straight years as the most-watched morning show in total viewers, a testament to the anchors leading the program and their longtime staff. But it almost didn’t happen. “I think I turned it down three times because I just didn’t think I was the right fit for it,” recalls Stephanopoulos, sitting in a green room in Disney’s newly-opened New York headquarters building, a few minutes after th...