protecting military systems using surger and blocking devices and we can do the same thing. mark: what is that? >> a metal box that encloses the structure from the emp getting in at electronics. air force one is a gigantic farrahday cage. mark: and prevents the electromagnetices attacks. >> keeps the electronics inside safe. we can do the same thing for the electric grid. the emp estimated it would cost two to three billion. mark: for the entire grid? >> yes, the entire national grid, which is what we used to give away to foreign aid to pakistan until president trump stopped that exercise. if we took the foreign aid to pakistan -- mark: i don't understand, they spend over $4 trillion a year. >> yes. mark: the gao reports we waste