Outside the warehouse at the beginning there is a sign that says "Kirby Glen, Storage Depot, No. 1917", this is a reference to Jack Kirby, the co-creator of the X-men comic books - 1917 was the year of his birth.
1st full appearance of Iceman. The X-Men also made reference to Bobby being an original member of the X-Men. Also the debut of Lorna (Polaris), X-Factor (Forge, Havoc, Strong Guy, Quicksilver, Wolfsbane & Multiple Man)
In the comics, X-Factor consisted of the original X-Men team working for the government. Eventually over time the roster was made up of the members as seen.