Yemen's warring government and Houthi rebels set Jan. 20 for swap of more than 15,000 prisoners from both sides

The Associated Press was the first private sector organization in the U.S. to operate on a national scale. Over the past 170 years, they have been first to inform the world of many of history's most important moments, from the assassination of Abraham Lincoln and the bombing of Pearl Harbor to the fall of the Shah of Iran and the death of Pope John Paul.

Today, they operate in 263 locations in more than 100 countries relaying breaking news, covering war and conflict and producing enterprise reports that tell the world's stories.