The memory of NPR photojournalist David Gilkey, who was killed on assignment in Afghanistan on Sunday, lives on through his most stirring works.
Gilkey, 50, died alongside NPR's Afghan interpreter Zabihullah Tamanna, 38, when the Afghan army unit they were traveling with came under attack.
The celebrated journalist put a human face on some of the world's greatest devastations and conflicts, from famine in Somalia to apartheid atrocities in South Africa.
"It's not just reporting. It's not just taking pictures," Gilkey told NPR after covering the 2010 earthquake in Haiti. "It's, 'Do those visuals, do the stories, do they change somebody's mind enough to take action?'"
Scroll down to take a look at some of Gilkey's most evocative photos: