The Nazi-occupied Abbey of Monte Cassino, Italy, is destroyed by 254 American B-17, B- 25, and B-26 crews attacking in two waves. The ruins of the abbey will not be captured by Fifth Army until May 18, 1944.
The rate of building B-21 bombers would speed up if the fiscal 2026 defense budget passes. But it remains unclear how much capacity would be added, and whether the Air Force would simply build the bombers faster, or buy more.