LOS ANGELES:  Actresses Sandra Bullock and Melissa McCarthy are mounting a challenge to this summer’s male-dominated comedies with their buddy cop comedy “The Heat” opening at movie theaters on Friday. The R-rated comedic offerings at the summer box office have so far included three guys heading to Las Vegas to hunt down a gangster in “The Hangover 3,” two middle-aged men interning at Google in “The Internship” and a group of male celebrities preparing for the apocalypse in “This is the End.” “The Heat,” by “Bridesmaids” director Paul Feig brings together an unlikely duo, pairing an uptight FBI agent.–Reuters