Vodafone Group CEO Arun Sarin kicked off the second day of the CTIA Wireless show here in Las Vegas by explaining to the audience that Virgin Group CEO Richard Branson's keynote yesterday was partially an April Fool's joke. "Richard Branson regaled you with ideas about Mars yesterday… but I have to remind you: Today is April 2nd and we're going to get down to business right away," Sarin said to applause and laughter. Click to read more on his keynote