WASHINGTON - (AP) - President Barack Obama said Thursday he hasasked nuclear regulators to do a comprehensive review of the safetyof U.S. plants in light of the disaster in Japan, saying "nuclearenergy is an important part of our own energy future." Obama said he made the request to the Nuclear RegulatoryCommission. He spoke after the commission's head said that it couldtake weeks to bring the crippled nuclear complex in northeasternJapan under control. In brief remarks at the White House, following a trip to theJapanese Embassy to express his condolences, Obama also sought toassure the nation that the disaster currently posed no threat tothe United States. "We do not expect harmful levels of radiation to reach the WestCoast, Hawaii, Alaska or the U.S. territories in the Pacific,"Obama said, repeating the remark for emphasis.