Russian agents were on his trail before he was poisoned. When he survived, alarm bells rang in Moscow

At about 9 a.m. on August 13, a 33-year-old Russian woman named Maria Pevchikh checked in for a flight from Moscow to the Siberian city of Novosibirsk. She was not alone.

At about 9 a.m. on August 13, a 33-year-old Russian woman named Maria Pevchikh checked in for a flight from Moscow to the Siberian city of Novosibirsk. She was not alone.