The Tribune photo, dated July 28, 1986, has the following caption on the back: "SHOWOFFS These wing-walking daredevils were among the performers in the annual Livermore Air Show yesterday at the city's airport. Sponsored and operated by the nonprofit Wings for Charity, the show raises funds for Livermore Valley charities. The group hopes this year's effort will surpass the $28,000 it raised last year." In the photo a biplane with smoke spewing from under its fuselage has a wing walker at each end of the lower wing, one standing upright, the other looking as though he might be startinga mid-air somersault.