“Are you ready?” says the voice behind the smartphone, which pans along a queue.
Six gay men and 11 transgender women stand together in single file, clutching their papers. Just metres ahead are the revolving grilled gates of the US-Mexico border.
Each member of the group looks nervous, and each has dressed for the occasion. One of the trans women, in a lacy white dress and diamanté tiara, exhales deeply and looks up at the ceiling. One of the gay men, wearing a checked shirt and smart black trousers with bleached blond hair gelled firmly into place, takes an anxious glance at a guard standing behind them.