A tense wait for an imprisoned son

Ella Milman jumped when her cellphone rang Tuesday. She took a deep breath. The caller was the White House operator and said she would be connecting the call to Air Force One. There was a long pause, then a familiar voice: "Joe Biden," the president started. "I’m so sorry. You must be in so much pain." Ms. Milman was sitting with Mikhail Gershkovich. They are the parents of Wall Street Journal reporter Evan Gershkovich, who was arrested by Russian security services last month while on a re