HARDTACK-Teak was an exoatmospheric high-altitude nuclear weapon test performed during Operation Newsreel. It was launched from Johnston Atoll on a Redstone missile. On 1 August 1958, the 3.88 Mt (16.2 PJ) shot detonated at an altitude of 76.8 km (252,000 ft; 47.7 mi).
Along with HARDTACK-Orange it was one of the two largest high-altitude nuclear explosions.
Wernher von Braun, who led the development of the Redstone missile, was a witness at the test aboard the USS Boxer.
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