Excerpt: What will happen to Social Security? Is age 65 the 'new' 45? How much can a retiree withdraw without running out of money? What's the best way to invest for retirement, with modest returns predicted? Those and many other questions were the topics discussed by a host of well-known planning luminaries, such as Robert Pozen, Nick Murray, Mitch Anthony, Deena Katz, Roy Diliberto, Dan Moisand and many others, at The Financial Advisor Retirement Planning Symposium in Las Vegas April 20-22.