October 19: ‘Mix and match’ booster shots? Latest on Haiti kidnappings. Remembering Colin Powell. Katie Couric on new memoir “Going There.”

<p>FDA reportedly on track to allow ‘mixing and matching’ of booster shots — Dr. Ashish Jha on what this means for you and your family. Plus, the efforts to free the 17 missionaries being held hostage by a Haitian gang — overnight, a report the kidnappers are demanding $17 million for the group’s release. Also ahead, the growing tributes to the life and legacy of former Secretary of State Colin Powell — Andrea Mitchell has a closer look at his remarkable life. And, Katie Couric returns to Studio 1A. She sits down with Savannah Guthrie to talk about her new memoir “Going There.”</p>