¡¡  WASHINGTON, April 4 (Xinhuanet) -- The United States said on Monday that it continues to be concerned about Iran's nuclear weapon program and urged Teheran to cooperate with the International Atomic Energy Agency.

    White House spokesman Scott McClellan said at a news briefing that "we believe it is very important that Iran cooperate fully with the International Atomic Energy Agency and provide the agencyaccess to their sites, so they can fully inspect."

    The United States has been accusing Iran of developing a nuclear weapon program and threatens to refer the matter to the United Nations Security Council, but Iran has insisted that its nuclear program is for civil purposes only. Enditem