text: The first Grand Slam was dropped from , landing  short and the second fell  off target to the north, due to flak (anti-aircraft fire) and aiming problems. The Tallboys hit the middle of the bridge and the ends were blown off their piers; the pier to the east collapsed onto the ground and the western pier was twisted and sagged to the ground at one place; part of the railway track, above the embankment and the first pier on the west side, was wrecked. One Lancaster was shot down near Okel and left a crater  deep; five Lancasters were damaged by flak and an attack by a Me 262 jet fighter.
  Nienburg, 22 March
  Twenty Lancasters of 617 Squadron, six carrying Grand Slams fuzed for 25–30 seconds' delay and 14 with Tallboys with 25–35 seconds' or one-hour delay, attacked the railway bridge at Nienburg, between Bremen and Hanover, in atmospheric conditions ideal for bombing. A railway bridge at Bremen was attacked at the same time by 9 Squadron with Tallboys. The bombers were escorted by 114 Mustang Mk IIIs and 69 Spitfire Mk IXs from 11 Group squadrons. The Lancasters of 617 Squadron bombed within one minute, dropping five Grand Slams and twelve Tallboys. One Lancaster crew claimed a near miss with a Grand Slam and another crew claimed a hit,