HEARTWARMING STORY: A letter that surfaced online this week has left fans around the world in tears. Written from a quiet hospital ward, it carried a message of gratitude addressed to none other than Paul McCartney — the legendary Beatle whose music has defined generations. For the past several years, away from the spotlight, Paul has been quietly devoting himself to a mission few ever knew about: offering rare and deeply personal acts of kindness to children battling life-threatening illnesses. What that letter revealed was not just the story of a rock icon, but of a man whose compassion may have saved lives in ways the world never imagined…