>> The one and only Chaka Khan is at H2O tonight as a pre-party of sorts to the kick off of Howard Homecoming festivities, which officially start tomorrow. Doors at 5 p.m., show begins at 7. >> Operation Filmmaker is documentary of sorts that follows the strange story of Iraqi film student Muthana Mohmed. Mohmed was given an opportunity to work as a production assistant in Prague on the set of Liev Schreiber’s 2005…