Cindy McCain: America is still worth fighting for

Cindy McCain writes that even in America's darkest days heroes have emerged in all corners of the nation because, like her late husband John McCain, they believe the country is a cause worth fighting for. "That's why at this pivotal moment in our history, we're marking a new dawn with a National Day of Service on January 18 -- the day we honor Martin Luther King Jr.'s pursuit of social justice through peaceful action." […]