The new U.S. ambassador to the UN has started his first day at work, with a closed-door conversation with Secretary-General Kofi Annan.
When Bolton arrived at the UN, he told Annan he was "glad" to be there, gave him his credentials and then had a brief, private meeting with him.
Bolton entered and left the UN without comment, which is uncharacteristic of him. The controversial Bolton is known for speaking his mind.
As U.S. ambassador, Bolton is going to be thrust into intense negotiations on contentious issues ranging from Security Council reform to stepping up the global fight against terrorism.
Bolton was given a recess appointment yesterday by President Bush, bypassing Senate confirmation after Democrats had blocked a vote.
His fellow ambassadors seem to be keeping an open mind. Chile's UN ambassador says "No one should make prejudgments on reputation." And Denmark's ambassador says Bolton will be received as "a colleague like any other."