Striker, who goes by an alias to protect his identity, the leader of Constitutional Patriots New Mexico Border Ops militia Team, smokes a cigarrette outside the team's camper near the US-Mexico border in Anapra, New Mexico on March 20, 2019. - "Our long term goal is to be here until the wall is built, assist the border patrol best way you can, whatever they are doing," he explained. In recent months, thousands of Central Americans have arrived in Mexico in several caravans in the hope of finding a better life in the United States. US President Donald Trump has branded such migrants a threat to national security, demanding billions of dollars from Congress to build a wall on the southern US border. (Photo by Paul Ratje / AFP)