"In 2015, I photographed on the southern Mexico border with the International Committee Of The Red Cross which was assisting migrants with accommodation, medical care, security, and education. Many had suffered extortion, rape, and kidnapping. Some, migrants, thrown from the roof of trains for non-payment to gang members, were undergoing prosthetic treatment having lost their legs under train wheels. In the fall of 2018, I returned to Mexico City and accompanied the 5,000 member caravan on the remaining 1,800 mile trip to the U.S. border. They moved in a large mass as a form of protection. In May...