By Ned Potter and Richard Sergay July 12 — Would you like to fly — really fly? No planes, no airport lines, not even any wings — just you and the wind in your face? James Bond did it — sort of. In the 1965 film Thunderball, 007 escapes the bad guys with a jet pack strapped to his back. The jet pack was genuine — it was designed by an engineer at Bell Aerospace Corp. — but it barely had enough fuel to stay in the air for 30 seconds. Private flight has always seemed to be one of...