initial construction budget of over $210 million, high maintenance costs of the new facility, "six-figure" utility bills, and "lower-than-expected" ticket sales, COSI's reliance on admission revenue proved an unsuitable long term plan. In 2004, the museum spearheaded an effort to assess a property tax levy, chaired by former NASA astronaut John Glenn. The levy would have imposed a property tax on residents of Franklin County, who would receive free admission in return. The levy failed. As a result, the south wing of COSI's "blimp" structure was closed. As part of the reconfiguration of the museum following the loss of the levy in 2004, COSI opened only five days per week instead of seven. Many of the museum's exhibits were announced to close permanently (though many have re-opened in stages in the years since). Two of the original exhibit areas were closed permanently (called i|o and SimZone, the spaces they formerly occupied are now Gallery 1 and Energy Explorers, respectively). Closures from 2004 that have since been reversed include Space (relocated to Level 1 in 2005, then to the Mezzanine in 2012), the original Gallery 1 (space reused as WOSU@COSI in September 2006), Adventure (re-opened as an additional-charge experience in September 2010), CityView (still off-limits to the public; now available for special events), and the Planetarium (re-opened in November 2014 as the final piece of the building to come back online). During the spring and summer of 2005, COSI hosted the blockbuster traveling exhibition "Titanic: The Artifact Exhibition" and saw record attendance (prompting the return of the exhibit in 2010). In the summer of 2006, COSI hosted another large exhibit: "Star Wars: Where Science Meets Imagination", produced by the Museum of Science, Boston. In April 2006, Dr. David Chesebrough, former president and CEO of the Buffalo Museum of Science, became COSI's new president and CEO. He replaced former NASA astronaut Kathryn D. Sullivan, who became COSI science advisor on a volunteer basis while serving as the Director of Ohio State University's Battelle Center for Mathematics and Science Education Policy. Since then, COSI has integrated additional-cost traveling exhibits as part of its funding model. The museum has hosted EINSTEIN, An Exhibition on the Man and his Science (2007), Gregor Mendel: Planting the Seeds of Genetics (2007), CSI: The Experience (2008), Geckos: From Tail to Toepads (2011), Dinosaurs: Explore. Escape. Survive. (2011) (2011), RACE: Are We So Different? (2012), WATER (2012), LEGO Castle