The B61-13 bomb is indeed a new addition to the US nuclear arsenal, designed to replace the B61-12 with a maximum yield of about 340 to 360 kilotons, significantly more powerful than the B61-12's 50 kiloton yield. Delivery to the US Air Force has begun, with operations expected to begin from fiscal year 2028.

The B61-13 bomb is indeed a new addition to the US nuclear arsenal, designed to replace the B61-12 with a maximum yield of about 340 to 360 kilotons, significantly more powerful than the B61-12's 50 kiloton yield. Delivery to the US Air Force has begun, with operations expected to begin from fiscal year 2028.