An asylum seeker hangs his cellphone on a rope while recharging the battery, while he waits to attempt to cross into the U.S. by an appointment through the Customs and Border Protection app, called CBP One, at a makeshift camp, in Matamoros, Mexico June 21, 2023. President Joe Biden promised to replace the hardline policies of former President Donald Trump, including the COVID-era public health order Title 42, with a more humane immigration system. The new Biden regulation allows migrants once again to ask for asylum at the border, but wait in Mexico for a slot on the app or risk a sped-up deportation process that could be conducted while they are held in detention. But in the first month of the new policy, Reuters found tens of thousands of people are waiting in dangerous Mexican border towns to snag a spot on the app, according to U.S. and Mexican officials, amid warnings from humanitarian groups of deteriorating sanitary conditions at migrant camps. REUTERS/Daniel Becerril