How Putin's crackdown on dissent became the hallmark of the Russian leader’s 24 years in power

TALLINN, Estonia (AP) — When charismatic opposition leader Boris Nemtsov was gunned down on a bridge near the Kremlin in February 2015, more than 50,000 Muscovites expressed their shock and outrage the next day at the brazen assassination. Police stood aside as they rallied and chanted...