By David Boston Charlize Theron.  Robert Downey, Jr.  Jennifer Aniston.  Adam Levine.  Joe Johnson.  Alessandra Ambrosio.  What do all of these celebrities have in common (besides being A-list actors, musicians, athletes, and supermodels)?  They all swear by yoga.  And their physical appearance and mental aptitude enthusiastically scream the benefits associated

©2015 Bloomberg News NWBXGQ6JTSER (Bloomberg) — Older U.S. workers are defying expectations, and international trends, when it comes to their labor force involvement. Americans are living longer, are less likely to have pension plans, and are in better health further into old age — yet a long-running uptrend in 55-64