Accepting his 2007 TED Prize, photojournalist James Nachtwey talks about his decades as a war photographer. A slideshow of his photos, beginning in 1981 in Northern Ireland, reveal two parallel themes in his work. First, as he says: "The frontlines of contemporary wars are right where people live." Street violence, famine, disease: he has photographed all these modern WMDs. Second, when a photo catches the world's attention, it can truly drive action and change. In his TED wish, he asks for help gaining access to a story that needs to be told, and developing a new, digital way to show these photos to the world