"BALLS 17 is a venue for projects that should NOT be flown publicly due to safety and legal restrictions. This may include, but is not limited to, LARGE rockets, complex staging or clustering, metal rockets, self designed and/or fabricated rocket motors and new technologies being developed or proven." That's the disclaimer on the BALLS Experimental Rocket Launch website. Their 17th annual meeting just concluded in Nevada's Black Rock Desert where at least one rocket cracked 70,000 feet. Many others had successful flights. And some just blew up. Photography by Erik Charlton. See more of his fantastic shots from the event here .