I am very disappointed by Beijing’s decision to revoke the visa of 2006 Olympic gold medalist Joey Cheek, a move that will effectively bar him from attending this year’s games. Mr. Cheek is the co-founder of Team Darfur, an organization that draws attention to the plight of children in the Darfur region of Sudan, and he was the U.S. flag bearer at the closing ceremonies of the 2006 Turin Olympics. Today’s news, together with reports that Beijing will also bar Team Darfur’s other co-founder, Brad Greiner, is not in keeping with China’s pledge to hold an open games. Significantly, Team...