Vice President Joe Biden, left, makes a humorous remark as President Barack Obama signs a series of executive documents, Wednesday, Jan. 21,2009, during a meeting with their senior staff, at the Eisenhower Executive Office Building in the White House campus in Washington.

In a first-day whirlwind, President Barack Obama showcased efforts to revive the economy on Wednesday, summoned top military officials to the White House to chart a new course in Iraq and eased into the daunting thicket of Middle East diplomacy.

"What an opportunity we have to change this country," said the 47-year-old chief executive, who also issued new ethics rules for his administration, hosted a reception at the presidential mansion for 200 inauguration volunteers and guests selected by an Internet lottery and even took the oath of office again after it was flubbed Tuesday.

After dancing at inaugural balls with first lady Michelle Obama past midnight, Obama entered the Oval Office for the first time as president in early morning. He read a good luck note left behind by President George W. Bush, then began breaking cleanly with his predecessor's policies.

Aides circulated a draft of an executive order that would close the detention facility at Guantanamo Bay, Cuba, within a year and halt all war crimes trials in the meantime.

Closing the site "would further the national security and foreign policy interests of the United States and the interests of justice," read the draft prepared for the new president's signature. A copy was obtained by The Associated Press, and an aide said privately that Obama would sign a formal order on Thursday.

Some of the 245 detainees currently held at Guantanamo would be released, while others would be transferred elsewhere and later put on trial under terms to be determined.

Obama's Cabinet was moving closer to completion.

At the Capitol, the Senate confirmed Hillary Rodham Clinton as secretary of state after a one-day delay forced by Republicans. The vote was 94-2, and spectators seated in the galleries erupted in applause when it was announced. read more