U.S. NOW WEIGHING 'FIRST STEP' PACT ON A-TESTS IN AIR; Support of Ban Limited to Blasts in Atmosphere Would Be Policy Shift BRAZIL OFFERED PLAN Capital Wants Full Accord on All Firings but Believes Moscow Will Not Agree U.S. NOW WEIGHS 'FIRST STEP' PACT
US studies '1st step' treaty to ban tests in atmosphere; still prefers total ban; knew of Ital proposal and did not object