On April 19, 1995, Oklahoma City suffered the largest domestic terrorist attack on American soil. The Alfred P. Murrah Federal Building, located in Downtown Oklahoma City, was the site of a calculated explosion that killed 168 people and injured hundreds more. During the search and rescue efforts, critical information in the form of hand-written notes was passed between first responders via couriers equipped with golf carts due to the lack of seamless interoperable communications between responders.