TOKYO (AP) — As North Korea begins a 10-day period of mourning to mark the 20th anniversary of the death of its first leader, Kim Il Sung, Pyongyang watchers are paying closer attention to his grandson — who was shown on state media walking to his seat for a memorial event with a noticeable limp.

Kim Jong Un seemed to have somehow hurt his leg enough to require a slight, but visible, limp as he marched across the stage Tuesday to assume his position of honor. He limped again as he left the room when the event was over.