ieee vt “ Tor osSECirea =e Yow DELETED Production of XW-25 warheads of stockpile quality is scheduled to begin in the April-June quarter. 4, Retirement of the Cless A thermonuclear weapon (Mark 17) began in January. WEAPONS DESIGN AND DEVELOPMENT New Development Programs 5. A feasibility study was completed and a development program was established for the new Class 3 thermonuclear weapvon (TX-41), PELETED Lek. DELETEL _ DOE ARCH abyVino 6. A joint progrem with the Navy was euthorized for the development of a laydown weapon DELETED using the Lulu warhead (XU-34), 17 inches in diameter, weighing 330 pounds prLETED pony DELE Yul 7. A develovoment program was establisned for a modification of the Class D thermonuclear bomb (TX-28), 20 inches in Giameter, DELDTTID LiLlTey will be parachute ‘The modified veysion (®X-28-x1) stabilized for low-level delivery and will provide a capability of in-flignt selection for either free-fall or drosue-parachute retardation,