Nicholas Herman and his wife, Shannon Claire Smith, had dreamed for years of moving from Charlotte, N.C., to Washington. In April 2014, Herman, 30, flew to Washington for a job interview. When Smith, 29, arrived to pick him up from the airport, he handed her his phone: He had an e-mail offering him the position in the George Mason University development office, starting in two weeks.First, she burst into tears. [...]