Apple CEO Tim Cook used a "Good Morning America" appearance on Monday to shut down growing speculation about his future at the company, telling viewers that retirement talk is nothing more than a rumor. Asked about reports that he was preparing to step aside, Cook told ABC, "No, I didn't say that. I haven't said that. I love what I do deeply. Twenty-eight years ago, I walked into Apple, and I've loved every day of it since." He added that he "can't imagine life without Apple." The comments come