Who are some of the Americans behind bars in Russia, and what are the prospects for their release?

Arrests of Americans in Russia have become increasingly common with relations sinking to Cold War lows. U.S. citizens jailed on various charges in the country include a vacationing corporate security executive and a dual national visiting her family in Tatarstan. Wall Street Journal reporter Evan Gershkovich was convicted of espionage Friday and sentenced to 16 years in prison in a trial that his employer and the U.S. government denounced as a sham. Washington accuses Moscow of using U.S. citizens as bargaining chips, but Russia insists they all broke the law. While high-profile prisoner exchanges have occurred in the past, the prospects of further swaps are unclear, and so is the overall number of those in Russian custody.