Today, on Earth Day, John Kerry shares the news that’s most on his mind. Kerry grew up all over the world. He volunteered for Vietnam, and came home disillusioned. At 27, he spoke out against the war, earning him a spot on President Richard Nixon’s “Enemies List.” Later, he represented Massachusetts for 28 years in the U.S. Senate. As President Barack Obama’s secretary of state, he helped negotiate a deal to stop Iran from getting a nuclear bomb and was instrumental in signing the Paris climate change accord. He may be out of government, but he’s still in the fight — with plans to publish his memoir this fall.