The IRS launched a new mobile app that will let taxpayers check refund statuses and make payments directly from their phones, expanding the agency's digital services as it works to combat fraud and protect taxpayer information.IRS CEO Frank Bisignano joined FOX Business' Stuart Varney on "Varney & Co." to discuss the app's security, growing demand for online services and the agency's efforts to combat identity theft."100%, 100% secure," Bisignano said of the new app, which will allow taxpayers to complete tasks on their phones rather than redirecting them from an older app to the IRS websi...