 It was to involve high towers with radar and cameras that send information to bases in Tucson and Sells, where directions were to be sent out to specially equipped Border Patrol vehicles about targets for apprehension.Project 28 was the effort to test this strategy on a stretch flanking the border on either side of Sasabe.There were to be two towers on the Tohono O'Odham Nation west of the Baboquivari Mountains and 7 towers in the Altar Valley and southwest of Arivaca.