It's not always clear how technology is changing photography, as this 30-year-old photo by Dirck Halstead goes to prove ...

But Clinton's represented something different ... This wasn't the only notable first for the official White House portrait; it was also the first one done by a Black artist.

Clinton meets JFK in 1963. As a teenager, Bill considered careers in music and medicine. But in 1963 he took a trip to Washington, D.C. as a delegate to Boys Nation; in the White House Rose Garden ...