Test: MET Time: 11:15, 15 April 1955 (PST) Location: Nevada Test Site (NTS), Frenchman Flats Test Height and Type: 400 Foot Tower Shot Yield: 22 kt MET stands either for "Military Effects Test" or "Military Effects Tower" (according to Frank Shelton). This was a LASL test of a composite U-233/plutonium bomb core (the first test by the U.S. to use U-233) in a Mk 7 HE assembly.