Air Operations, Aleutians

12 28th Composite Bomb Group B-24s, 25 B-25s, and 2 343rd Fighter Group P-38s mount a total of 6 separate attacks against Kiska.

Air Operations, Europe

Photo of Lead Crew of the 427th BS for mission #44 on June 25, 1943 Hamburg

• 473 aircraft are set to Gelsenkirchen. In this total are 214 Lancasters, 134 Halifaxes, 73 Stirlings, 40 Wellingtons and 12 Mosquitos.
• This is the first raid on this target since 1941 when it was one of Bomber Command's regular 'oil targets'. The raid is not a success. The target is covered in cloud and the Oboe Mosquitos fail to produce regular and accurate marking since 5 of the 12 Oboe aircraft find their equipment not working correctly.
• 13 Lancasters, 7 Halifaxes, 6 Stirlings and 4 Wellingtons are lost.

• 33 aircraft are sent to lay mines in the Frisians and off the French ports.
• 1 Lancaster is lost.

Air Operations, Mediterranean

Allied bombing continues in preparation for the invasion of the island of Sicily. 300 tons of bombs are dropped on Messina, an important transportation and communication center.

Air Operations, New Guinea

V Bomber Command B-25s attack Japanese Army ground positions around Sepu.

Air Operations, Solomons

• 42nd Medium Bomb Group B-25s escorted by P-40s attack the Vila airfield on Kolombangara.
• During the night, XIII Bomber Command B-24s attack the airfield at Ballale and nearby targets.

Germany, Planning

Hitler decides to launch the much-postponed Operation ZITADELLE (CITADEL) on July 5. Repeated delays are largely due to problems with the new tanks and the critical Italian situation.

Occupied Poland

Jews in the ghetto of Czestochowa begin an uprising. The ghetto is immediately reduced to rubble with an unknown number killed.