An uninvited guest crashes the world’s largest international naval exercise. A Chinese spy ship is watching over the Rim of the Pacific exercise that runs until Friday. But the ship isn’t breaking any navigation laws, so Chinese military experts say it’s a non-issue. Sam LaGrone, news editor of the US Naval Institute, broke the news of the ship’s presence outside RIMPAC. On In Depth with Francis Rose, he explains why it’s not a huge surprise.