Princess of Wales Kate Middleton announced on Instagram that she will attend Trooping the Colour this weekend, her first official public appearance since she announced she had cancer. Journalist and royal family expert Rob Shuter joins "Elizabeth Vargas Reports" to discuss. #princess #katemiddleton #elizabethvargasreports Anchor Elizabeth Vargas delivers the biggest stories, without bias or opinion. Watch "Elizabeth Vargas Reports" every weeknight at 6p/5C on NewsNation. #VargasReports NewsNation is your source for fact-based, unbiased news for all America. More from NewsNation: newsnationnow.com Get our app: trib.al/TBXgYpp Find us on cable: trib.al/YDOpGyG How to watch on TV or streaming: trib.al/Vu0Ikij