“You can be and do just about anything you dream of”: Angela Bassett, Loretta Devine and Lela Rochon are looking back at their beloved film, “Waiting to Exhale,” which premiered 30 years ago this month. They told Gayle about the film’s message, improvising on set and remembering their fourth co-star, Whitney Houston, who died in 2012: “She stood up for us.” | CBS Mornings