In this Thursday, Nov. 8, 2012 photo, photographer Don McCullin discusses his feelings and work as a war photographer while being interviewed at the Houston Museum of Fine Arts' war photography exhibit in Houston. The exhibit includes the work of 280 photographers from 28 nations covering the Mexican-American war in 1846 to present-day. McCullin has four photos in the exhibit. (AP Photo/Pat Sullivan)

Associated Press
In this Thursday, Nov. 8, 2012 photo, photographer Don McCullin discusses his feelings and work as a war photographer while being interviewed at the Houston Museum of Fine Arts' war photography exhibit in Houston. The exhibit includes the work of 280 photographers from 28 nations covering the Mexican-American war in 1846 to present-day. McCullin has four photos in the exhibit. (AP Photo/Pat Sullivan)
In this Thursday, Nov. 8, 2012 photo, photographer Don McCullin discusses his feelings and work as a war photographer while being interviewed at the Houston Museum of Fine Arts' war photography exhibit in Houston. The exhibit includes the work of 280 photographers from 28 nations covering the Mexican-American war in 1846 to present-day. McCullin has four photos in the exhibit. (AP Photo/Pat Sullivan)