The exact precision of coordination of music as the fireworks went off was done with perfection and beauty. Participants came from 50 states and over 30 countries for a weeklong convention that was filled with seminars. Educational and scientific techniques were emphasized along with safety. A large number of younger members were involved in creation of building a display of fireworks that were shown Wednesday evening. Friendships have been built through the years that enthusiasts have been getting together. Membership is over 3,500 and brings a wide range of background experience. Tom Sklebar of the PGI said that, “many of the members donate their time, talent, skills and we have become like a family.” Members also compete for many categories in aerial shells, ground displays, proximate shows, Class C extravaganzas and more. PGI was founded in 1969 and each year holds the week of seminars and display in different cities throughout the country; 2018 to be held in Mason City, Iowa.