The Department of Homeland Security Office of Emergency Communications (OEC) Border Interoperability Demonstration Project (BIDP) was a one-time $25.5 million grant program that focused on identifying innovative solutions to interoperability along the northern and southern U.S. borders. While the grant program has closed, OEC remains focused on transferring BIDP information and knowledge to all border communities and other interested parties. In addition to a closeout report and the BIDP Study on Implementing Interoperability Channels along and across the United States–Canadian Border, as well as the BIDP Study on Rural and Urban Area Interoperability Solutions along and across International Borders, OEC published two additional studies