First Lady Michelle Obama, left, Jennifer Pilcher, a Navy spouse and Dr. Jill Biden, wife of Vice President Joe Biden, celebrate three generations of military families during a Joining Forces Mother's Day event at the White House in Washington, D.C., May 10, 2012. First Lady Michelle Obama, left, Jennifer Pilcher, a Navy spouse and Dr. Jill Biden, wife of Vice President Joe Biden, celebrate three generations of military families during a Joining Forces Mother's Day event at the White House in Washington, D.C., May 10, 2012. SHARE: Download: Full Size (4.45 MB) Tags: Photo Essays Credit: VIRIN: 504798-Q-ZLD62-977.jpg Photo Gallery