Reporters fawned Tuesday over 16-year-old climate activist Greta Thunberg's response to a sarcastic tweet from President Donald Trump. "She seems like a very happy young girl looking forward to a bright and wonderful future," Trump tweeted after Thunberg warned the U.N. of a coming "mass extinction." She seems like a very happy young girl looking forward to a bright and wonderful future. So nice to see! https://t.co/1tQG6QcVKO — Donald J. Trump (@realDonaldTrump) September 24, 2019 In response, Thunberg changed her Twitter bio Tuesday to read, "A very happy young girl looking forward to a bright and wonderful future." The move...