Fox news says the man's wife thinks he was probably heading for an air show in NC. Could be just your average Joe...but why not respond to radio warnings?
The plane is registered to Vintage Aero Club in Smoketown, Pa. It was scheduled to be flown Wednesday by Jim Sheaffer of Lititz, Pa., and student pilot Troy Martin, of Akron, Pa., to an air show in Lumberton, N.C.
http://www.msnbc.msn.com/id/7817210/