US marks four-year anniversary of Paul Whelan’s detention in Russia, Blinken calls it an ‘unfathomable ordeal’

• Secretary of State Antony Blinken said securing Whelan’s release remains a top priority – it was hoped he would be included in Brittney Griner’s prisoner swap
• The Michigan corporate security executive was given a 16-year prison sentence in Russia on espionage charges that family and the government say are baseless