This homeowner uses a genuine surplus SR-71 Blackbird rudder as his house number sign. The piece of aviation history is anchored in hundreds of pounds of concre

This homeowner uses a genuine surplus SR-71 Blackbird rudder as his house number sign. The piece of aviation history is anchored in hundreds of pounds of concrete to prevent it from being stolen. (Via Linda Sheffield) When it comes to engineering achievements, the SR-71 Blackbird remains one of the…