tv/ movies: B Movies: Say his name 3 times....?

Questions

A waste of time in frivolous action?

Device installed on a deck of a warship for launching aircraft?

Hand tool for gripping nuts or bolt heads?

On This Day In January 1953 - U.S. ______ Harry Truman announced the development of the hydrogen bomb.?

On This Day In January 1954 - The Duoscopic TV receiver was unveiled this day. The ______ set allowed the watching of two different shows at the same time.?