Unique among planned special event activities are those events that carry the National Special Security Event (NSSE) designation. NSSEs occur with some frequency, with 35 of these events held between September 1998 and February 2010. These events include, but are not limited to, presidential inaugurations, presidential nominating conventions, major sports events such as the Super Bowl, and major international meetings such as the G-20 Summit. The US Secret Service (USSS) designates these planned special events due to the Secret Service’s responsibility for operational security for events of national significance. In most cases, NSSEs affect the transportation system for the jurisdiction in which the NSSE occurs. This document provi...