On July 17, country singers Tim McGraw and Billy Currington will headline a fundraiser for gun control group Sandy Hook Promise in Connecticut. Sandy Hook Promise was founded after Adam Lanza stole various firearms then carried out a heinous attack on Sandy Hook Elementary. NBC Connecticut quoted McGraw as saying: Out of this tragedy a group was formed that made a promise to honor the lives lost and turn it into a moment of transformation. Sandy Hook Promise teaches that we can do something to protect our children from gun violence. I want to be a part of that promise...