A maintenance worker said Wednesday he told hotel dispatchers to call police and report a gunman had opened fire with a rifle inside the Mandalay Bay Resort and Casino hotel before the shooter began firing from his high-rise suite into a crowd at a nearby musical performance. The revised timeline has renewed questions about whether better communication might have allowed police to respond more quickly and take out the gunman before he committed the deadliest mass shooting in modern U.S. history. Worker Stephen Schuck says he was checking out a report of a jammed fire door on the 32nd floor...