Raoni Metuktire has been an outspoken activist against Brazilian leaders who have been dismissive of the destruction plaguing the Amazon.
The president is scheduled to speak on Tuesday as world leaders gather at the United Nations in New York.
"Even if Trump himself is interested in negotiations, the people around him are committed to not letting that happen," said the president of the National Iranian American Council.
Secretary of State Mike Pompeo said on Sunday that President Donald Trump is "happy to talk with folks at any time."
President Hassan Rouhani's chief of staff said the current Iranian administration and the Iranian people "will not yield to pressure."
If her speech at the UN is any indication, Theresa May prioritizes nationalist concerns over humanitarian ones.
Will China's increased commitment to the peacekeeping forces be a blessing or a curse?
If Abbas wants to abandon the Oslo Accords, he should resign and disband the Palestinian Authority.
Humans rights groups are fair game for the government, whether they're guilty or not.
U.N. members voted earlier this month to allow the Palestinian and Vatican flags to fly.
Speaking at the U.N., Mahmoud Abbas said Israel violated the Oslo Accords.
Beijing currently has 3,000 troops on peacekeeping duty; the U.S. has less than 100.
The two leaders are to hold face-to-face talks on the Syrian conflict on Tuesday.
The Portals project has connected U.S. cities to Afghanistan, Iran and Honduras.
Obama asked for more commitments to contain the disease, which has killed nearly 3,000, before it threatens global and regional security
#FreeAmir campaign posts new video and heightens efforts to bring former U.S. Marine Amir Hekmati home as Iranian delegation arrives in New York
Amid global turmoil, the secretary-general says climate change will dominate General Assembly discussion along with Ebola and ISIS.