SIERRA VISTA — The sky over Sierra Vista and Palominas will see an Independence Day aerial salute Tuesday morning as a four F-16s from the Arizona Air National Guard fly over the area. The quartet will be led by a Hereford resident. For years the active duty Air Force and Air National Guard units have responded to requests for flyovers on special patriotic holidays, including Armed Forces Day, Memorial Day, the Fourth of July, POW/MIA Recognition Day and Veterans Day. This year, the 162nd Fighter Wing at the Tucson International Airport approved a flight over Southern Arizona, which includes Sierra...