Investigation launched into deadly Houston helicopter-radio tower crash
Four people were killed, including a child, when a helicopter crashed into a Houston radio tower Sunday. The NTSB is investigating the crash. CBS News transportation safety expert and analyst Robert Sumwalt has more.
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Four people were killed, including a child, when a helicopter crashed into a Houston radio tower Sunday. The NTSB is investigating the crash. CBS News transportation safety expert and analyst Robert Sumwalt has more.
