An Investigation Is Underway As To What Caused A Small Plane Crash At Tri Cities Airport. It Happened Last Night Around Eight O’clock In The Approach Area Of Runway 23. A Witness Said The Small, Single Engine Experimental Category Aircraft Known As A Velocity Was Attempting To Land When The Engine Sounded Funny. The Plane Landed On The Grass Short Of The Runway And Then Flipped Onto Its Top. Two People On Board Were Conscious And Taken To An Area Hospital For Treatment Of Minor Injuries.