There was some controversy over Iran's involvement in the Rio+20 conference. Iran sent a delegation, which included President Ahmadinejad, to Rio in June to attend the summit. The controversy of Iranian attendance at the summit surrounded Iran having serious environmental issues, which it has refused to address, continuing human rights violations and is refusing to cooperate with the IAEA over its contentious nuclear program. Ahmadinejad was met with demonstrations, attended by thousands of people, on his arrival in Rio.