Located in the suburbs of Tijuana, Mexico, the Casa Arco Iris migrant shelter is unassuming. That’s on purpose. Not so long ago, its exterior was graffitied with a homophobic slur. Casa Arco Iris, or Rainbow House, offers refuge for gay and trans migrants headed to the United States. Thousands of migrants have sought asylum in America in the last few years, fleeing violence and persecution. LGBT refugees are often more low profile, and advocates say there’s a reason for that: while other migrants find support in their respective communities here in the U.S., this is a group that often gets shunned and attacked.