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A covert feather or tectrix on a bird is one of a set of feathers, called coverts (or tectrices), which cover other feathers. The coverts help to smooth airflow over the wings and tail. The coverts help to smooth airflow over the wings and tail.
The tail covert (or "train") of the male is the longest of any bird and is believed to contain the longest (and widest) feathers to occur in a wild bird; the Reeves's pheasant has tail feathers of similar length but which are considerably narrower. The tail coverts measure up to 1.73 m (5.7 ft) in length, giving the bird a total length of 1.9 ...
Ravens with a T-28D Trojan at Long Tieng, Laos, 1970. The Raven Forward Air Controllers, also known as The Ravens, were fighter pilots (special operations capable) unit used as forward air controllers (FACs) in a clandestine and covert operation in conjunction with the US Central Intelligence Agency (CIA) in Laos during America's Vietnam War.
Also, covert feathers; tectrices – singular: tectrix. A layer of non-flight feathers overlaying and protecting the quills of flight feathers. At least one layer of covert feathers appear both above and beneath the flight feathers of the wings as well as above and below the rectrices of the tail. [116] These feathers may vary widely in size.
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By comparison, there was an essentially bottomless pool of 10,000 replacements per year available for the Vietnamese Communists. [10] During the Vietnamese Campaign 139, which threatened the existence of Vang Pao's L'Armee Clandestine, 300 Thai artillerymen of Special Requirement 9 arrived at Long Tieng. They arrived on 18 March 1970, when Vang ...
Operation 34A (full name, Operational Plan 34A, also known as OPLAN 34-Alpha) was a highly classified United States program of covert actions against the Democratic Republic of Vietnam (DRV or North Vietnam), consisting of agent team insertions, aerial reconnaissance missions and naval sabotage operations.
Võ Việt Nam (Cuton) or Võ Đạo of Phạm Văn Tan. [2] Vietnamese Wing Chun - a style of Wing Chun founded by Yuen Chai-wan. [3] Overseas. Cuong Nhu of Ngô Đồng (d. Florida 2000), known also by the Japanese title O Sensei. Qwan Ki Do, founded in France. [4] Tam Qui Khi-Kong, now popular in Russia. Traditional Vietnamese wrestling.