Word: radar
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Dates: during 1960-1969
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...howitzers. When the lowering clouds lifted a few hundred feet, dartlike Air Force F-100s, Navy and Marine F-4 fighter-bombers and stubby A-4 light bombers zipped under the overcast to place high explosives on the spreading enemy trenches. Huge, eight-jet B-52s, which bomb by radar, flew over Khe Sanh regardless of the weather...
...final speech on the ground that Washington should retain some flexibility; thus many listeners inferred that the bombing would continue only in the area immediately north of the Demilitarized Zone. The day after the speech, U.S. bombers ranged more than 200 miles into North Viet Nam to raid a radar site in the Thanh Hoa area, just below the 20th. The first high praise of Johnson's initiative turned suddenly in some quarters to sour disillusion. Said an Administration official: "We had a public relations catastrophe on our hands...
...drive to instill faith in the forecasts, stations are erecting radar towers and hiring meteorologists who are called "Dr." and give their reports from "Weather Central" - a far corner in the studio. No matter that in many cities the U.S. Weather Bureau offers a recorded telephone service which gives all the weather a person wants or needs to know in 40 seconds or less...
...cast doubts on what is, on paper, an impressive fighting machine. The plane can fly faster and farther than any earlier U.S. fighter-bomber and lift twice the bomb load (12,500 Ibs.). Its great strategic importance in Viet Nam was to be that its new inertial guidance and radar targeting system enables it to bomb in foul weather or fair, either by night or by day. Its arrival in force would thus mean that the U.S. could keep up its aerial bombardment of the North despite monsoon rains or heavy cloud cover...
Under the Net. The F-111 is the world's first combat plane with the so-called "variable geometry" wing, which extends for greater lift during takeoff and landing, folds back for less drag at supersonic speeds. Its "terrain radar," which automatically adjusts the plane's altitude to accord with the topography, is supposed to enable the plane to hug the ground while flying at a speed of 900 m.p.h. and thus dash in below the enemy radar net. If the first F-111 did hit a mountain, it was probably due to a malfunction in the terrain...