There have been many falsehoods circulating the internet about Barack Obama including a rumor Obama does not put his hand on his heart during the pledge of allegiance.
Consider these photos:
George W. Bush:
Everyone else in the photo appears to have their hand on their heart while Bush has his hand on his… stomach? Did he eat something bad for lunch? Is he unpatriotic because he places his hand on his stomach rather than his heart?
Obama, on the other hand, knows where his heart is.