South China Sea
A Chinese naval vessel picked up an underwater drone operated by the United States leading to a diplomatic standoff and speculation that the action was meant to provoke President-elect Trump. China would subsequently return the drone and claim there was no cause for concern and that the detention of the drone was a routine reaction to foreign incursion.
The Russian ambassador to Turkey, Andrei Karlov, was assassinated at an art gallery in apparent response to Russia’s involvement in Syria. The assassin, a Turkish police officer, had gained access to the gallery under false pretenses and proceeded to shoot Karlov, fatally injuring him.
Twelve were killed and 56 injured when a truck was driven into a holiday market. ISIS has claimed responsibility, but no attacker has been detained.
Thirty-five or more were killed in an explosion at a fireworks market in Tultepec, Mexico. A major center of firework production, Tultepec is a major center of sales and marketing for the industry. An investigation into the exact cause is ongoing.