Although an effort was begun in the 1930s to create a United States-Mexico International Peace Park in the area, joining Big Bend National Park with the Maderas del Carmen Protected Area in Coahuila, since May 2002 the border crossing within Big Bend National Park to Boquillas has been closed indefinitely by order of the U.S. Department of Homeland Security. As of October 2006, only 19 families, totaling about 90-100 remain in Boquillas. The rest have been forced to move away by the closure of the tourist crossing to Big Bend National Park. These postcards, and proceeds from their sale will be donated to Fronteras Unlimited, a relief effort to help the families of Boquillas del Carmen hurt by the aftermath of the closing of this informal border crossing.