WASHINGTON (AP) — The blaring, grinding noise jolted the American diplomat from his bed in a Havana hotel. He moved just a few feet, and there was silence. He climbed back into bed. Inexplicably, the agonizing sound hit him again. It was as if he'd walked through some invisible wall cutting straight through his room. ...On Tuesday, the State Department disclosed that doctors had confirmed another two cases, bringing the total American victims to 21. Some have mild traumatic brain injury, known as a concussion, and others permanent hearing loss. Even the potential motive is unclear. Investigators are at a...