In sum, Amtrak police officers have the same police authority as a local or state law enforcement officer within their jurisdiction. They investigate various types of crime that occur within and around stations, trains and/or right of ways. Since the September 11, 2001 attacks, APD has become more terrorism-focused. Such mission shift became even more prevalent after the Madrid train bombings in 2004. It maintains a robust K-9 division composed of patrol and bomb dogs. APD officers constantly work in partnership with federal, state and local law enforcement to perform their duties in accordance with the agency's mission to protect America's railroads. In theory, officers have jurisdiction in all the 46 states where Amtrak operates, but are stationed more in busier locations in practice.