Bush Says Aim Is to Ease Entry Of Land Force
Pres Bush says American air attacks in Afghanistan are aimed at paving way for friendly anti-Taliban forces on ground to defeat government; says enemy's air force and air defenses are being demolished; aide says Bush's reference was to Northern Alliance and anti-Taliban groups in Afghanistan, and not to use of American and British troops; AC-130 gunships flown by special operations forces blast target around Kandahar, important Taliban stronghold; warplanes employed over no-flight zones in southern Iraq join in aerial bombardment for first time; military official says majority of attacks are focused on military garrisons, airfields and air defenses especially around Kandahar and Kabul; attacks are far from front lines being patrolled by Northern Alliance, whose representatives are complaining that US is not doing enough to help; spokesman for Joint Chiefs of Staff says US military is making no special effort to coordinate strategy with anti-Taliban group, but is systematically attacking elements of Taliban military that will eliminate its ability to support Al Qaeda terrorist network; photo (M)