This is Sharqawi Al Hajj, a 47-year-old man from Yemen. He has been detained in Guantánamo for 17 years without charge. Guantánamo opened 19 years ago today. Not pictured are his five siblings in Yemen, who see him a few times a year on video calls looking gaunt. His siblings' children, who see their uncle looking gaunt and stricken. Not pictured is his mother, who died a few months ago, who last saw him in his 20s. His father, who died before her. Not pictured are the detainees in his camp, who have walked around each other for 19 years without seeing another soul but their guards and...