There was great doubt of the merits of completing the "Tiger"s, given that Soviet Tupolev Tu-95 "Bear" turboprop and Tupolev Tu-16 "Badger" jet bombers flew faster and higher than anticipated just as the Mikoyan MiG-15 fighter demonstrated in the Korean War from 1950, which added to the argument for missile equipped-ships for anti-aircraft defence. The 6.9-inch armour and speed and range also outclassed the two turret "Tiger"s. Even six-inch bombardment was increasingly unacceptable to the Royal Navy after Korea and was allowed only on the first day of Operation Musketeer after strong political opposition. The RN staff were completely divided over the development of new AA guns larger than 4-inch post war including Charles Lillicrap, the Director of Naval Construction, in 1946 who saw the new 3-inch/70 as eliminating the need for the new Mk 26 DP and advocating suspending cruiser design (due to irrevocable divisions within the RN over future gun development) as much as lack of finance. That and the fact the new twin 3-inch/70 and twin Mk 26 6-inch were six years from being tested led to both "Tiger"s and "Minotaur"s being suspended in 1947, and slowed work on the new six-inch and proposed new 5-inch guns. The proven Mk 23 seemed more than adequate for GFS and its efficiency was improved in the 1950s.