As an aircraft engineer I believe most crashes could be considered flying into the ground, LOL!
I personally believe that the V-22 is a horribly foolish design that lifts itself from its extremities in a balance critical fashion when it could do the same job better if the rotor or coaxial rotors pivoted from above the aircraft's center of gravity along the aircraft's center line to in front of the craft. I personally believe the design was drawn up by an artist, and then forced upon the engineers. Unfortunately simple, stable, and effective were abandoned in favor of the "cool looking" Rube Goldberg designed contraption that is the V-22. Best of luck to your son. I hope he stays safe while protecting us.
If I had my way Marine 1 would be an Osprey and Obama, Biden, Reid, and Pelosi would all ride on it together.
You may get your wish on Marine-1 being an Osprey. I know it's been up for consideration, although I'm not sure what the current status is.
This aircraft is used quite often to move VIP's from one point to another.
I'm not an engineer but I work with an engineering group. I know how engineers can differ, sometimes vehemently, in their design ideas.
The fact of the matter is that this is the first operational loss of an MV-22 by the Marine Corps.
The sensational losses occurred during testing phases of this aircraft.