One of the experiments involving the use of pigs in Plumbbob is a test of fabrics and materials to determine their capacity to withstand the heat (or thermal) effects of atomic detonations. On one shot in ’ the series, approximately 70 Chester White pigs are being used to test a wide variety of fabrics and materials which might eventually contribute to the design of military uniforms. The pigs, placed in enclosures, are anethetized, and receive considerably fewer calories of thermal than they are capable of withstanding and surviving. No fatalities were expected. U. S. Navy non-rigid airships, or "blimps", are being used in some shots to_collect effects data. The Navy also will conduct effects tests on helicopters on many shots during the series. The Air Force ts continuing to collect data on the effects of atomic detonations- upon in-flight aircraft, These and all of the other military effects tests are con-_ ducted as a cooperative effort of the Armed Forces Special Weapons Project and the individual Military Services. U.S.Army LL The Army is participating in many test projects--test of ordnance material, test of field fortifications, evaluation of detonation and cloud tracking systems, field evaluation of shielding for engineer heavy equipment, evaluation of water decontaminating methods, troop test of atomic burst equipment, and four observer projects. The Army will conduct an Infantry troop test in connection with the "open shot" scheduled for August 19, in which some 2,100 troops will employ new tactics which may be used on the atomic battlefield. The test, which will see the Infantry Battle Group and to repel a mythical attack by consists of three parts to be the use of two new types of Army units, the Army Aviation Battalion, employed an aggressor force against Las Vegas, conducted over a four-day period, Part I is an operation involving Infantry defense against an atomic explosion to determine and establish the troop support, material and equipment required by a battle group to construct a defensive position adequate for protection from the effects of an atomic explosion. Part II jnvolves an aerial movement by helicopter of a battle group to an "enemy" objective 30 miles behind his front lines to determine tactical doctrine, organization, planning data and helicopter requirements for the movement of a battle group, by helicopter, to seize a deep objective in conjunction with the use of an atomic weapon. Part III involves the aerial re-supply entirely by helicopter of the battle group in the forward position for a two-day period to determine techniques and procedures necessary to effect re-supply, by helicopter, of a battle group. ee - 62 - meee iw COPIED/DOE LANL RG OU \