4 Acronyms CBP U.S. Customs and Border Protection CCAC Closed/Control Access Center CJEU Court of Justice of the European Union DHS U.S. Department of Homeland Security ECHR European Convention on Human Rights ECtHR European Court of Human Rights EU European Union ICE U.S. Immigration and Customs Enforcement INA U.S. Immigration and Nationality Act OADS Open-Air Detention Sites PRDC Pre-Removal Detention Center Immigration Detention Across Borders Detention of Asylum Seekers in the United States and the European Union