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 Space Force is canceling a competition to build new satellites for jam-resistant tactical communications, instead choosing to focus on operationalizing two prototypes it plans to launch next year.