Watch the dramatic opening sequence of "Mosul," a new documentary filmed on the ground during what has been called the deadliest urban warfare since WWII. "Mosul" premieres Wed. October 18th at 10 p.m. EST / 9 p.m. CST on PBS and online: www.pbs.org/wgbh/frontline/film/mosul Twitter: twitter.com/frontlinepbs Facebook: www.facebook.com/frontline Google+: plus.google.com/+frontline/posts FRONTLINE is streaming more than 200 documentaries online, for free, here: to.pbs.org/hxRvQP FRONTLINE is made possible by PBS and CPB. Major support is provided by The John D. and Catherine T. MacArthur Foundation. Additional funding is provided by the Ford Foundation, the Park Foundation, The John and Helen Glessner Family Trust, the Heising-Simons Foundation, Wyncote Foundation, and the FRONTLINE Journalism Fund with major support from Jon and Jo Ann Hagler on behalf of the Jon L. Hagler Foundation.

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