Japs Stunned By Ferocity Of U.S. AttackBatteries So Wrecked That Defenders Have Only Small Arms LeftBy ALVA DOPKING Associated Press War Correspondent (Representing the Combined American Tress)NAMUR ISLAND, KWAJALEIN ATOLL IN THE MARSHALLS. Feb. 2. — (Delayed) — (/P) — United Stales Marines are mopping up on the last enemy resistance today on Roi and Namur Islands, all but levelled by the heaviest naval bombardment in history that cleared the wav for (lie invasion foiccs.