The VB-3 Razon (for range and azimuth) was a standard 1,000-pound general purpose bomb fitted with flight control surfaces. Development of the Razon began in 1942, but it did not see use during World War II.
19th Bomb Group B-29s dropped 489 Razons during the Korean War, the first in August 1950. Razons were not ideal weapons. For instance, the warhead was usually not big enough to drop a bridge (it took on average four Razon hits). Also, about one-third of those dropped did not respond to radio control. Despite these difficulties, B-29 bombardiers destroyed 15 bridges with Razon bombs.