What to Know

President Donald Trump praised Charlie Kirk as a “great American hero” and “martyr” for freedom as the president and other prominent conservatives gathered on Sunday evening to honor the slain conservative political activist .

Trump is holding a news conference at 4 p.m. ET to announce "significant medical and scientific findings for American children." Trump teased last week that his administration would reveal new findings on the cause of autism.

World leaders are gathered in New York City for the 80th session of the United Nations General Assembly.

Britain, Canada, Australia and Portugal formally recognized a Palestinian state on Sunday, joining nearly 150 countries that have already done so, and France was expected to do the same at the General Assembly.

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