A Swiss adventurer is making his first public flights in the United States this summer with his custom-built jet suit. Yves Rossy, also known as "Jetman," is making appearances at the Experimental Aircraft Association's AirVenture in Oshkosh. He flew in his carbon-Kevlar jetwing with four engines for reporters on Monday. He can go as high as 12-thousand feet (3658 meters) but prefers to stay around 5-thousand feet (1524 meters) to do formations and manoeuvres.