Helicopter crashes into radio tower in Houston, killing 4

HOUSTON (AP) — Officials say four people aboard a tour helicopter were killed when it crashed into a radio tower in Houston and burst into flames. Officials said the helicopter crashed just before 8 p.m. on Sunday in a neighborhood east of downtown. It had taken off from nearby Ellington Field. Officials said no one on the ground was injured. Some vehicles were damaged by no nearby homes were. The National Transportation Safety Board says its investigating the crash of the Robinson R44 II helicopter, which preliminary information shows was operating as an air tour flight.