Best of 2011

Remembering Princess Diana on Her 55th Birthday: Images We Can't Forget

She was the most photographed woman in the world. Here, the shots that stand the test of time

In Danger for a Cause

The Princess famously donned a flak jacket and a face shield while touring an Angolan mine field, on behalf of the Red Cross, on Jan. 15, 1997. Diana later said that land mines – and the destruction they cause – is "something to which the world should urgently turn its conscience."