A bill to amend title II of the Social Security Act to provide that an individual who has a service-connected disability incurred or aggravated while on active duty in a combat zone and rated by the Veterans' Administration at 50 percent or higher, or who dies as a result of disease or injury incurred or aggravated while on such duty, shall be considered to be fully insured, and to be insured for disability benefits, under the old-age, survivors, and disability insurance system.