"We regret the accident of the Air Force helicopter crash, " President Juan Manuel Santos of Colombia said in a message posted on his official twitter account.

CNN: Colombian Air Force helicopter crashes, killing 13

Last summer, an NRC task force reviewed the Fukushima accident and came up with a dozen recommendations to reduce U.S. reactor vulnerability.

CNN: Our reactors still vulnerable, a year after Fukushima

He participated in several U.S. Air Force and National Transportation Safety Board accident investigations, and worked with NASA scientists on a paper on error and aviation, according to his resume.

CNN: US Airways captain the 'consummate pilot'

As long as enemies were not crazy or accident prone, the thinking went, a secure retaliatory force should be sufficient to deter nuclear attack.

FORBES: Nuclear Paradox: Shrinking U.S. Arsenal Requires Huge New Expenditures

Mr Murphy said that one medical expert who had examined the fractures to Millie's ribs, claimed the force required to cause such injuries was akin to something "like a road traffic accident".

BBC: Barry McCarney

Just this morning I turned on my car in the driveway (the car I lent to a 17-year-old African-born youth last night so he could drive with other African-born youths to a Korean take-out chicken place called Mo Betta Wings) and an X-rated hip-hop song blasted with such explosive force from the radio that, for a second, I thought I'd been in an accident.

CNN: I see America's diverse future--in my house