Yesterday, Discovery Communications announced that it will work with the White House to support military families through Discovery Education, TLC, Military Channel and Discovery’s social media division. The support, which will take place in schools, on-air and online, will generate awareness for returning troops and America’s military families as part of Joining Forces, a national initiative launched yesterday by First Lady Michelle Obama and Dr. Jill Biden. In addition, MythBusters Jamie Hyneman…