UNITED STATES 3RD DIVISION CAPTURES AL ISKANDIRYAH, HEADING NORTH TO NEXT STOP AT AS SUWAYRAN 55KM SOUTH MILES SOUTH OF BAGHDAD--WITHOUT ENCOUNTERING ANY RESISTANCE--MILITARY EXPERTS FEAR THE UNITED STATES 3RD DIVISION UNOPPOSED HIGH SPEED PUSH TO BAGHDAD MAY BE A TRAP FOR IRAQI ARMY TO HIT DIVISIONS FLANKS (WHEN TEMPERATURES SOAR TO 100 F IN NEXT TWO DAYS)