For the first time, five African American surgeons now lead the Trauma Service at the preeminent Johns Hopkins Hospital. This milestone, recognized during Black History Month, proves generations of determination behind every title. Linsey Davis reports. | ABC World News Tonight with David Muir

Over the past 25 years, Jack Sheahan has seen his fair share of anchors on 'World News Now.' And some of them sent him special messages to celebrate his milestone! | World News Now

TIME FLIES! It's hard to believe that it's already been 2 years since our dynamic anchoring duo joined forces on our broadcast. Here's a look back on the most memorable moments. | World News Now