Word: tested
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Dates: during 1980-1989
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AIDS sufferers and their support groups have reacted enthusiastically to CD4, but researchers strongly caution against premature euphoria. Says Ronald Mitsuyasu, associate director of UCLA's AIDS Clinical Research Center: "In the test tube, a lot of these drugs look like they inhibit the virus 100%, but when you use them on patients in a clinic it's a different story...
Assorted tools, wire, rocks and dirt are not the stuff that spooks seek in spy novels. But such materials turned up last month when Soviet inspectors searched personal items being shipped home by three Americans working for the Energy Department at the Semipalatinsk nuclear test site. Soviet authorities charged that the items were sensitive and that shipment of them was banned under the agreement permitting each superpower to monitor underground tests on the other's territory...
After last week's disappointment, Navy Captain Frederick Hauck, Discovery's commander, issued a carefully worded statement to the press: "Although we were disappointed that today's test did not go full term, we were impressed with the professional manner with which the launch team responded to the situation." While Talone believes that morale remains high, he admitted that "there is a certain amount of frustration because we thrive on doing these things completely and getting them done...
...five aborted engine tests so far have been due to fueling problems, specifically in lines that carry liquid hydrogen from ground equipment to the tank. After two of the failures, several hours were required to unload more than half a million gallons of liquid hydrogen and oxygen from Discovery's tanks before technicians could examine problems. NASA engineers are not certain exactly what caused last week's problem. Said Joseph Lombardo, who oversees the shuttle's main-engine project at Marshall Space Flight Center in Alabama: "We don't know whether it was a faulty indication or really a malfunction...
Whether or not the next test succeeds, other problems threaten to slow the countdown. Massive solid-fuel booster rockets like those on the shuttle must undergo a critical test, scheduled for Aug. 20 at the Morton Thiokol facility in Utah; the failure of a seal on a booster was responsible for the Challenger disaster. In addition, Discovery has a pressure-vent-line leak in one of its orbital maneuvering system engine pods, which came to light several weeks ago. NASA says repairs to the OMS pod, which involve cutting through a bulkhead, could delay the launch anywhere from a week...