Syrian civil war: The Battle of Raqqa begins with an offensive by the Syrian Democratic Forces (SDF) to capture the city from the Islamic State of Iraq and the Levant (ISIL).

Eastern Mediterranean event. A near-Earth asteroid estimated at ten meters in diameter explodes over the Mediterranean Sea between Greece and Libya. The explosion is estimated to have a force of 26 kilotons, slightly more powerful than the Nagasaki atomic bomb.

Punsalmaagiin Ochirbat wins the first presidential election in Mongolia.

Soyuz 11 is launched. The mission ends in disaster when all three cosmonauts, Georgy Dobrovolsky, Vladislav Volkov, and Viktor Patsayev are suffocated by uncontrolled decompression of the capsule during re-entry on 29 June.

New Deal: U.S. President Franklin D. Roosevelt signs the Securities Exchange Act of 1934 into law, establishing the U.S. Securities and Exchange Commission.

The first drive-in theater opens in Camden, New Jersey.