Show All Aircraft To he be Grounded September 2 All commercial and private aircraft will be grounded for fora a 5 hour period on Sunday afternoon September 2 This grounding Is a 11 part of Sky Shield III an extensive mill tary air defense exercise which is to test the North American Air Defense system It will encompass the entire North American continent north of the United States States- Mexico border Frontier Airlines I ed flights that day will shut down along with the opera opera operations of f the 1800 aircraft fleet ot of the nations nation's scheduled lit air carriera from om to pm Mountain Standard Time pm to pm Central Co Standard Time Although the travel plans of at some passengers will be af af- af affected by the grounding of all commercial flights Frontier and all other airlines will get back into scheduled opera immediately following the air defense exercises Tra Tra- Travel vel on most airlines is normal ly at a minimum on the mid dIe day of this day 3 Labor Day weekend This Is one reason that the Defense De De- selected the day September 2 so as to b have vo minimal impact upon air tra- tra travel tea vel puns |