- Doctors announce world's second known case of semi-identical twins, a boy and girl from Brisbane, Australia
- First gun control legislation for 25 years passed by US House of Representatives, with new federal background checks
Michael Cohen, former lawyer to Donald Trump testifies before the House Oversight Committee saying Trump is "racist", a "con man" and "a cheat"
- Pakistan shoots down an Indian fighter jet and captures the pilot, further escalating tensions in the disputed Kashmir region
- Second summit begins between US President Donald Trump and North Korea's leader Kim Jong-un in Hanoi, Vietnam
- Smallest baby boy ever born to be later successfully released, goes home, after original birth weight of 268g (9.45oz) from Tokyo hospital
- Train crashes into a buffer at Cairo's main railway station killing 25 and injuring dozens in Egypt
- Nathaniel Taylor, American actor (Rollo-Sanford & Sons), dies at 80