The M1 tank based self-propelled air-ground defense system (AGDS) was a proposal published in US Armor magazine, July-August 1996 edition. It was developed by Dr. Asher H. Sharoni and Lawrence D. Bacon from Western Design Howden (WDH). It was a legitimate concept but of course never realised. Armed with two 35mm guns and 12 ready to fire ADATS missiles it would have been a killer. No doubt would have been in high demand for OIF.