But one criticism is that the efforts appear to be lacking new hardened shelters for aircraft. Counterpoints, Hardened Shelters Don't Stop MissilesCredit: The U.S. National ArchivesOne issue with hardened shelters is that they provide fixed, known targets that are easy to hit. Hardened aircraft shelters can not realistically protect aircraft from direct missile impacts. Iran has also struck Israel's Nevatim Air Base (home to F-35s) and various US bases in the Middle East. It is not feasible to build hardened shelters able to protect aircraft from direct Tomahawk or GBU-24 2,000 lb bomb strikes.