such as the Heavy's "Sandvich" or the Sniper's "Jarate". The final video in the Meet the Team series, "Meet the Pyro", was released on June 27, 2012. Gabe Newell has stated that Valve used the "Meet the Team" series as a means of exploring the possibilities of making feature film movies themselves. He believes that only game developers themselves have the ability to bring the interesting parts of a game to a film, and suggested that this would be the only manner through which a Half-Life-based movie would be made. A fifteen-minute short, "Expiration Date", was released on June 17, 2014. The shorts were made using Source Filmmaker, which was officially released and has been in open beta as of July 11, 2012. In more recent major updates to the game, Valve has presented teaser images and online comic books that expand the fictional contuinuity and characters of Team Fortress 2, as part of the expansion of the "cross-media property", according to Newell. In August 2009, Valve brought aboard American comic writer Michael Avon Oeming to teach Valve "about what it means to have a character and do character development in a comic format, how you do storytelling". "Loose Canon", a comic associated with the Engineer Update, establishes the history of RED versus BLU as a result of the last will and testament of Zepheniah Mann in 1890, forcing his two bickering sons Blutarch and Redmond to vie for control of Zepheniah's lands between them; both have engineered ways of maintaining their mortality to the present, waiting to outlast the other while employing separate forces to try to wrest control of the land. This and other comics also establish other background characters such as Saxton Hale, the CEO of Mann Co., the company that provides the weapons for the two sides and was bequeathed to one of Hale's ancestors by Zepheniah, and the Administrator, the game's announcer, that watches over, encourages the RED/BLU conflict, and keeps each side from winning. The collected comics were published by Dark Horse Comics in Valve Presents: The Sacrifice and Other Steam-Powered Stories, a volume along with other comics created by Valve for Portal 2 and Left 4 Dead, and released in November 2011. Cumulative details in updates both in-game and on Valve's sites from 2010 through 2012 were part of a larger alternate reality game preceding the reveal of the Mann vs. Machine mode,