Amy Robach has shared a heartbreaking post with fans ahead of the 20th anniversary of 9/11.The Good Morning America star took to social media to tell fans that she would be reporting from the National September 11 Memorial & Museum in New York City, and said that Friday was a "crisp September day so reminiscent of 9/11"."It takes you right back to that day as we report here above the memorial for @goodmorningamerica and @abcgma3 on the eve of the 20th anniversary," she posted.MORE: Amy Robach is