Iran's president has warned that his government will not back down one iota in its nuclear dispute with the West.
The president attacked his domestic critics for pursuing a "vendetta"
Mahmoud Ahmadinejad was speaking at a rally marking the 29th anniversary of the Islamic Revolution.
He said Western pressure over the nuclear issue was just "playing with pieces of paper".
He said it would be a serious mistake for the UN Security Council to pass a new resolution toughening sanctions over Iran's nuclear programme.
Mr Ahmadinejad also announced that Iran would soon be launching two more rockets into space in preparation for Iran putting a satellite into orbit.
The BBC's Jon Leyne in Tehran says the move will be seen outside Iran as deliberately provocative.
A similar launch a week earlier was condemned both by the United States and by Russia.
Mr Ahmadinejad repeated his defiance over the nuclear issue to loud cheers from a huge crowd of supporters.
He went on to attack his critics at home, whom he accused of having a vendetta and of betraying their country.
The US has led Western efforts to stop Iran enriching uranium, fearing it could provide material for a nuclear arms capability, but Iran says its activities are entirely peaceful.