 Before we begin this next story, we want to let you know it talks about sexual assault, including crimes involving a child. It's about sex crimes committed by U.S. military personnel in Japan. A Japanese court held a preliminary hearing today for a U.S. airman accused of kidnapping and sexually assaulting a Japanese minor. This case and similar allegations are putting pressure on a key U.S. alliance in a strategic location. NPR's Anthony Kuhn reports.