A brief "60 Minutes" piece on the late David Bowie that aired Sunday was the result of a 15-year journey of missed connections involving three of the news magazine's correspondents and a rock star gone underground. On Sunday, "60 Minutes aired interview clips with Bowie that had been filmed in 2003. In 2000, an editor at "60 Minutes" proposed an in-depth profile of Bowie, and correspondent Ed Bradley was assigned. Before much was done, the 2001 terrorist attacks happened. Then the Iraq War--and a rock-star profile wasn't a priority. Bradley died in 2006. Mike Wallace had an accident and cancelled his interview with Bowie. Lesley Stahl couldn't interview the singer at length because he had to leave for a European tour. Bowie later had a heart attack and cancelled another interview, and refused another one as he battled the cancer that was to take his life.