LOS ANGELES, June 3: Will Smith may be one of Hollywood’s most bankable action stars, but his new film, “After Earth,” in which he stars with his 14-year-old son Jaden, has opened to cold reviews from critics and faces stiff competition in a busy box office weekend. “After Earth” is a futuristic post-apocalyptic tale of a father and his teenage son in which the young boy must embark on a life-saving mission. (agencies)