some instances drug traffickers have purchased Oʼodham land along the border. Many of the thousands of Mexican nationals, and other nationals illegally crossing the U.S. border to work in U.S. agriculture or to smuggle illicit drugs into the U.S., seek emergency assistance from the Tohono O'odham police when they become dehydrated or are stranded. On the ground, border patrol emergency rescue and tribal EMTs coordinate and communicate. The tribe and the state of Arizona pay a large proportion of the bills for border-related law enforcement and emergency services. The former governor of Arizona, Janet Napolitano, and Tohono Oʼodham government leaders have requested repeatedly that the federal government repay the state and the tribe for the costs of border-related emergencies. Tribe Chairman Ned Norris Jr. has complained about the lack of reimbursement for border enforcement. Citing the impact it would have on wildlife and on the tribe's members, Tohono O'odham tribal leaders have expressed opposition in a series of official statements to President Donald Trump's stated plan to build a wall along the U.S.–Mexico border. While the 1986 Tohono O'odham constitution gives the tribe sovereignty over their territory, this is nonetheless subject to the plenary power of Congress. Approximately 2,000 members live in Mexico, and a wall would physically separate them from members in the United States. Most of the 25,000 Tohono Oʼodham today live in southern Arizona, but several thousand of the Oʼodham, many related by kinship, also live in northern Sonora, Mexico. Today, many tribal members still make an annual pilgrimage to San Xavier del Bac and Magdalena, Sonora, during St. Francis festivities to commemorate St. Francis Xavier and St. Francis of Assisi, founder of the Franciscan Order. Integrated fixed towers Integrated fixed towers (IFTs) are solar-powered structures that integrates high technology, such as infrared and video machinery, to provide long-range, 360-degree, all-weather surveillance along the border. The proposed layout and size of the IFTs is said to range between 120 and 180 feet high, with each tower having its own equipment such as generators, propane tanks, and equipment shelters. The lot size of each tower varies between 2,500 square feet and 25,600 square feet, plus a fence that encompasses up to 10,000 feet. The radio technology of the tower permits the machine to be able to detect movement as far as from a 9.3-mile radius and vehicles from an 18.6 mile radius, while the long-range camera allows for