In the early 1950s the airport was served by the original Frontier Airlines (1950-1986) which flew DC-3's on a route from El Paso to Phoenix that included stops at Las Cruces, Deming, and Lordsburg, NM as well as Clifton, Safford, and Tucson, AZ.
A protected group is a group of people qualified for special protection by a law, policy, or similar authority. In the United States, the term is frequently used in connection with employees and employment.
Protecting Groups. Stability data for the most frequently used protective groups, protection and deprotection methods. Functional Groups: Amino; Carbonyl; Carboxyl; Hydroxyl (1,2-; 1,3-Diols)