W5

W5, W-5 or W.5 may refer to:

Business

Media

Places

Science

Aviation

Mark 5 nuclear bomb

The Mark 5 nuclear bomb and W5 nuclear warhead were a common core nuclear weapon design, designed in the early 1950s and which saw service from 1952 to 1963.

Description

The Mark 5 design was the first production American nuclear weapon which was significantly smaller than the 60 inch (150 cm) diameter implosion system of the Fat Man nuclear bomb design first used in 1945, down to 39 inches (99.1 cm) diameter. The Mark 5 design used a 92-point implosion system (see Nuclear weapon design) and a composite Uranium/Plutonium fissile material core or pit.

The Mark 5 core and W5 warhead were 39 inches (99.1 cm) in diameter and 76 inches (193 cm) long; the total Mark 5 bomb was 44 inches (111.8 cm) diameter and 129 to 132 inches (327.7 cm to 335.3 cm) long. The different versions of Mark 5 weighed 3,025 to 3,175 pounds (1,372.1 kg to 1,440.2 kg); the W5 versions weighed 2,405 to 2,650 pounds (1,090.9 to 1,202.0 kg).

The Mark 5 and W5 were pure fission weapons. There were at least four basic models of core design used, and sub-variants with yields of 6, 16, 55, 60, 100, and 120 kilotons have been reported.

W5 (TV series)

W5 is a Canadian news magazine television series produced by CTV News. The program is broadcast Saturday nights at 7 p.m. on CTV, with repeat broadcasts at later times on CTV as well as co-owned channels CTV Two, and Investigation Discovery. The program is also simulcast on CFRB in Toronto.

The title refers to the Five Ws of journalism: Who, What, Where, When and Why? It is the longest-running newsmagazine/documentary program in North America and the most-watched program of its type in Canada.

History

W5 is the longest-running current affairs/newsmagazine program in North America and the third longest-running Canadian television program.

It was launched as W5 in 1966 just after the demise of CBC Television's This Hour Has Seven Days, at a time when the CTV network was on the brink of bankruptcy. The program's magazine format is considered an inspiration for a number of similar programs, including the American series 60 Minutes which premiered two years later.

The program's first executive producer and host was Peter Reilly. He quit only a few weeks into the first season of W5, in a dispute with John Bassett, who owned the CTV network's biggest station, CFTO in Toronto. Reilly went on to become first host of the CBC's later current affairs offering, The Fifth Estate. Peter Rehak was executive producer through the 1980s and 1990s.