Book excerpt: This book recounts an unique chapter in the National Guard's efforts to keep America's borders secure. Starting in June 2006 and lasting until July 2008, Operation Jump Start exhibited unprecedented cooperation and teamwork among federal agencies engaged in protecting the homeland. The U.S. Customs and Border Protection, the U.S. Border Patrol and the National Guard created a cooperative, operational environment that will endure as an example on how to do things right. Based in Arizona, California, New Mexico and Texas, the Operation's mission was not to close the nation's border with Mexico but to make it more secure for legal immigration and commerce. By the time Operation Jump start ended, criminal activities of all types had declined along the border, and physical improvements made by Guard engineers along the border seemed certain to reduce illegal activities for the forseeable future.