Porchlight Pictures has completed principal photography on “Ground Zero,” a contemporary suspense thriller starring Jack Scalia, Reginald VelJohnson and Janet Gunn.From Richard Friedman’s script, “Zero” unfolds as a seismologist (Gunn) discovers her company’s plan to conduct an illegal underground nuclear arms test less than 100 miles outside Los Angeles. In an attempt to halt the testing, she teams up with an undercover hired gun (Scalia) and department head (VelJohnson). Friedman also directed and produced, along with Ralph Burris and Kenneth Burke. Bruce D. Johnson, William T. Baumann and Michael D. Jacobs served as exec producers. Porchlight will distribute the pic internationally, officially unveiling it at the upcoming Mipcom and Mifed markets.