A public entity must ensure that individuals with disabilities are not excluded from services, programs, and activities because its buildings are inaccessible. A State or local government's programs, when viewed in their entirety, must be easily accessible to and usable by individuals with disabilities (i.e., individuals with disability should be able to use the products and services of the state agency). This standard, known as "program accessibility," applies to facilities of a public entity that existed on January 26, 1992. Public entities do not necessarily have to make each of their existing facilities accessible if the program, when viewed in its entirety, is accessible. But they should still provide program accessibility. This can be accomplished by a number of methods including, but not limited to, alteration of existing facilities, acquisition or construction of additional facilities, relocation of a service or program to an accessible location, or provision of services at alternate accessible sites.