ALASKA (Eleventh Air Force) In the Aleutians, 6 B-24's and 12 B-25's fly 3 air-ground support missions to Attu. Due to bad weather they are routed to Kiska. Weather there is also poor and only 1 B-25 bombs the Main Camp area. Next, 3 B-24's and 18 P-38's fly 3 air cover missions to Attu. The last of these missions is notified by a PBY that 16 Japanese bombers are W of Attu. 5 of the P-38's then intercept the bombers over Attu, which jettison their bombs and close formation. The P-38's score 5 kills and 7 probables. 2 P- 38's are lost. The 344th Fighter Squadron, 343d Fighter Group begins a movement from Fort Glenn, Umnak to Shemya. The air echelon is operating with P-40's from Amchitka Island.
On Attu Island in the Aleutian Islands, the Americans begin a two-pronged attack on Fish Hook Ridge located southwest of Attu Village between Chichagof Harbor and the east arm of Holtz Bay. The 4th Infantry Regiment attacks the west face while the Southern Landing Force attacks the east face. The attacks are stopped cold by the Japanese.
A Navy construction battalion lands on Attu to begin construction of an airbase.
USA: The USS New Jersey BB-62 is commissioned. The sister ships of the Iowa class are: Iowa, Missouri and Wisconsin. She displaces 45,000 tons, with a length of 887 feet 7 inches, a draft of 38 feet and beam of 108 feet 1 inch. Powered by 4 Westinghouse turbines fired by 8 boilers, with 212,000 shaft horsepower, she has a top speed of 33+ knots.
She will carry a crew (WWII) of 120 officers and 3,000 enlisted men. Nine 16"/50 cal guns in 3 turrets are the main armament, with 20 5"/38 cal dual purpose guns in twin mounts for the secondary armament. AA weapons include 64 40mm AA guns in 16 guad mounts and 49 20mm AA guns. She carries 3 Vought OS2U Kingfisher floatplanes.
CENTRAL PACIFIC THEATER OF OPERATIONS (Seventh Air Force) In the Territory of Hawaii, a flight of P-40's on patrol from Kauai bomb a submarine from 1,500 feet (457 m), after which an oil slick and debris are seen.
SOUTH PACIFIC THEATER OF OPERATIONS (Thirteenth Air Force) 5 B-24's bomb the airfields at Kahili and Ballale Island during the night of 23/24 May. 10 B-17's, attempting a follow-up strike, abort because of bad weather. While other aircraft are successfully laying mines in the N Solomons in the Buin area, 19 B-17's and B-24's, in a diversionary raid, bomb the Buin-Kahili-Tonolai shoreline area.
SOUTHWEST PACIFIC THEATER OF OPERATIONS (Fifth Air Force) B-24's and B-17's hit the harbor and airfield at Kavieng, the airfield at Gasmata, and the village of Ubili. The 13th Bombardment Squadron (Dive), 3d Bombardment Group (Dive) transfers with B-25's from Port Moresby to Dobodura.