Cambodia's King Norodom Sihamoni (L) and his mother, former queen Monique, pay respects in front of a portrait of the late Thai King Bhumibol Adulyadej at the Thai embassy in Phnom Penh on October 18, 2016. 
Bhumibol Adulyadej, the world's longest-reigning monarch, passed away on October 13. / AFP / STR        (Photo credit should read STR/AFP/Getty Images)