(OLM8) SAN FRANCISCO, June 17--PALMER CHARGES INTO LEAD--Arnold Palmer lashes into a drive on the 17th tee of the Olympic Clubâäôs Lakeside course during the second round of the U.S.Open today, during which he fired a four-under-par 66 to take the early lead with a 36-hole total of 137. White object looking like oversized golf ball is the tee marker.(AP Photo)