1987 to take over the spot where The Edge had stood. Power Dive was an Intamin Looping Starship ride; it swung back and forth before eventually rotating a complete 360 degrees a few times. While operating the Six Flags chain, Bally found that the excess resources demanded and high seasonal fluctuations of the theme park business made it an unnecessary burden on its core interests. In 1987, Bally sold Six Flags to Wesray Capital Corporation and a group of Six Flags managers. Several acquisitions were re-sold or closed, while Wesray moved the company's focus from theming to major attractions. This ushered in an era of major new rides and roller coasters at Six Flags parks like Great America. 1988 saw the first of the new coasters, with the addition of the massive roller coaster Shock Wave, an Arrow Dynamics mega-looper, opening in Orleans Place section of the park on June 3. Shock Wave was the world's tallest roller coaster at the time it opened and was surpassed the following year by Cedar Point's Magnum XL-200. It also featured a record seven inversions, which was surpassed in 1995 by PortAventura Park's Dragon Khan. When Six Flags Great Adventure's Sarajevo Bobsled, an Intamin Bobsled roller coaster, closed in 1988, it was moved to Great America and became Rolling Thunder in 1989, also as part of the Ride Rotation Program. It was added between Demon and Whizzer, where it operated until 1996. It now operates as Alpine Bobsled at The Great Escape. For 1990, Bolliger & Mabillard constructed their first ever roller coaster with Iron Wolf, a compact steel stand-up coaster, opened on Z-Force's former spot in County Fair. The Condor was added to Orleans Place in 1991, next to Shock Wave. During the same year, the IMAX screen in the Pictorium was upgraded to allow 3D movies to be shown and fans said goodbye to Tidal Wave at the end of the season. It was relocated to Six Flags Over Georgia where it operated as Viper from 1995 to 2001, then to Kentucky Kingdom as Greezed Lightnin' from 2003 to 2009. 1990s: Transition into thrill park By 1990, Six Flags was on the verge of bankruptcy. Time Warner, which had held a major influence at Great America since the beginning through the licensing of its Looney Tunes characters, was a minority owner in the company and it purchased an additional share of