A security guard sits at the entrance to the apartment building where Liu Xia, the wife of late Nobel laureate Liu Xiaobo, lives in Beijing on July 21, 2017. More than a week after the Nobel Peace Prize winner succumbed to liver cancer in custody, four agents stood watch on the stoop of the apartment where his widow, the poet Liu Xia, has largely been kept under house arrest since 2010. / AFP PHOTO / YANAN WANG (Photo credit should read YANAN WANG/AFP/Getty Images)
