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.
Security groups are a named collection of network access rules that provide Rackspace Public Cloud users the ability to specify the types of traffic that are allowed to pass through, to and from ports (Public/ServiceNet) on a Cloud server instance. A security group is a container for security group rules.