How author Brad Meltzer uncovered the secret plot to kill George Washington

Bestselling author Brad Meltzer is known for crafting fictional thrillers. Now he’s focusing on a real-life mystery. In his new book, “The First Conspiracy: The Secret Plot to Kill George Washington,” the plot details an effort to undermine the American Revolution just before the signing of the Declaration of Independence. Meltzer joins “CBS This Morning” to discuss how he discovered the story.