Politics of Canada After her appointment by Prime Minister of Canada Justin Trudeau, former astronaut Julie Payette, in an installment ceremony, becomes the 29th Governor General of Canada.
Assassination of Kim Jong-nam Two women charged with the assassination of Kim Jong-nam plead not guilty in a Malaysian court because they thought it was a TV prank. Kim Jong-nam was the eldest son of deceased North Korean leader Kim Jong-il and the half-brother of current North Korean leader Kim Jong-un.
Politics of Ecuador Ecuador's Supreme Court orders that Vice President Jorge Glas be jailed for his alleged acceptance of bribes from the Odebrecht construction company. Prior to this, Glas had been free but barred from leaving the country.
Presidential election Russian opposition leader and hopeful presidential candidate Alexei Navalny is sentenced in Moscow to 20 days detention for organizing unauthorized public meetings. This is Navalny's third jail term this year.
Thailand–United States relations Thai Prime Minister Prayut Chan-o-cha meets with U.S. President Donald Trump in the Oval Office. Trump says he wants to lower the U.S. trade deficit with Thailand.
Egypt–North Korea relations Thirty-thousand North Korean rocket propelled grenades are seized off the coast of Egypt by American forces after being purchased by Egyptian business executives for $23 million (E£406 million-₩20 billion).
Nobel Prize in Physiology or Medicine The Nobel Prize committee awards Americans Jeffrey C. Hall, Michael Rosbash, and Michael W. Young the prize for their work on molecular mechanisms that control circadian systems.
Cardiac arrest After suffering a cardiac arrest in his Malibu, California home, American singer and songwriter Tom Petty dies at the UCLA Medical Center in Santa Monica, California, at the age of 66.
Syrian civil war Two suicide bombers attack a police station in the Al-Midan neighbourhood of Damascus, killing at least 15 people.
2017 Las Vegas shooting Without providing evidence, ISIL claims responsibility for the attack. U.S. law enforcement say they have found no evidence linking the perpetrator with international terrorist groups.
CBS fires Hayley Geftman-Gold, vice president and senior counsel of strategic transactions at CBS, for a social media post stating that she did not have sympathy for the shooting's victims because "country music fans often are Republican gun toters".
Stephen Paddock's former neighbors in Reno, Nevada, describe him as having a possible gambling problem.
Authorities name the shooter, who killed himself before police arrived at his room in the Mandalay Bay casino and hotel, as 64-year-old Nevada resident Stephen Paddock. Police find 23 guns in Paddock's hotel room, and 19 more at his Mesquite, Nevada, home.