What I Read -- Challenger (and a bit about the Francis Scott Key Bridge)

When K and I were in the DC area recently, we popped into Wonderland Books in Bethesda on a rainy morning.  K, who is a teacher and so perhaps was not surprisingly plagued by the story of the Challenger explosion, which took the life of Christa McAuliffe, the first and only participant in the Teacher in Space Project, pointed out the book Challenger to me.

Not long after that, it came up as one of the available audio books in my library app, so I grabbed it and gave it a listen. 

The beginning of the book is a little slow.  We spend a lot of time meeting various administrators who were involved with the program at NASA, employees of the subcontractors, the astronauts, and their families.  Much of that comes back later, but it could have used a bit more editing. 

The rubber really meets the road in about the last quarter of the book.  The disaster has occurred, the investigation is underway.  And man, are the results of it horrifying.  I'll avoid providing too much detail, but the combination of learning about what the astronauts likely went through and learning that the cause of the disaster was known and ignored is simply appalling.

It's also a good reminder that the small things can sometimes have a huge impact.  Remember a couple years back when that cargo ship crashed into the Francis Scott Key bridge in Baltimore?  Well, the NTSB has now issued the findings from their investigation.  The long and short of what they determined is that the ship lost power because a wire came loose in one of the many circuit breaker boxes.  The break in that circuit caused the system to believe that the engine cooling water level was low.  With that particular engine, the low cooling water warning causes the engine to shut down, which is why the ship lost propulsion and steering, and why it subsequently crashed into the bridge.  But what is the reason that the wire came loose?  Because the label that was affixed to it at the breaker box was affixed in the wrong place along the wire, which meant that it didn't quite seat properly, which allowed it to shake loose with all the engine vibration.  There is a great video animation of what went wrong here. 

Wild, right?  

Six people died, the ship and its cargo were damaged or lost, economic losses due to limited access to the Port of Baltimore for the 11 weeks following the crash are estimated at $1.2 billion, and bridge replacement costs are estimated to be $5 billion.  All because one label was glued to one wire in the wrong place.