Russian anti-corruption activist and opposition leader Alexei Navalny falls ill on a flight from Tomsk to Moscow, and is rushed to a hospital in Omsk after an emergency landing. His spokesperson, Kira Yarmysh, says it was suspected that he was poisoned by something mixed into his tea, with Navalny's team suspecting that it was in the airport café shortly before his flight. He is reported to be in a coma. French President Emmanuel Macron and German Chancellor Angela Merkel have offered Navalny medical assistance and unspecified protection in their countries.
Smoke from Russian wildfires covers famous landmarks and delays more than 140 flights at Moscow airports while official figures indicate that 14,340 people died in Moscow during July 2010; 4,824 more than the same month last year.
The MARS-500 project begins, with six men - three Russians, two Europeans and a Chinese man - entering the sealed facility in Moscow where they will spend 18 months in isolation from the outside world.