The Hard Line | Robert S. Walker on the 30th anniversary of the space shuttle Challenger tragedy

The Hard Line | Robert S. Walker on the 30th anniversary of the space shuttle Challenger tragedy

The Hard Line | Robert S. Walker on the 30th anniversary of the space shuttle Challenger tragedy

Executive chairman at Wexler & Walker, former US Congressman (R-PA), and former chairman of the House Science, Space and Technology Committee

User: The Vine Best

Views: 2

Uploaded: 2016-02-03

Duration: 12:58