Senate Endorses New Nixon Policy On Better ICBM's
Sen, 48-37, rejects Sen Thomas J McIntyre amendment to $21.9-billion mil procurement bill that would defer Adm's $77-million request for development of more accurate Minuteman missile with maneuverable warhead until Pres Nixon deemed MIRV limitation accord with USSR unattainable; vote endorses Adm's decision to evolve high precision weapons capable of 1st strike on Soviet missile silos, rather than proceed with retaliatory arms; approval of counterforce weapons seen as most drastic change in strategic policy; McIntyre, in closed-door session prior to vote, contended Minuteman missiles were sufficiently accurate for attack on Soviet bases; amendment's cosponsor Sen Edward W Brooke and opposition leader Sen John Stennis comment (M)