Halle Berry was cast, but dropped out, and was replaced by Katherine Heigl. Berry dropped out due to a custody battle with her ex-partner. After the custody battle was resolved, Berry was re-cast in the movie, but in another role.
When Kaminsky (Hector Elizondo) arrives, the message over the radio announces "The eagle has landed". This is the same code phrase used by Elizondo in The Princess Diaries (2001), for which it is the codename for Queen Clarice (Julie Andrews).
When Claire (Hilary Swank) hands the duties off to Kominsky (Hector Elizondo), she whispers in Chris "Ludacris" Bridges' ear, "Watch him like a hawk." In The Princess Diaries (2001) (in which Elizondo also starred), Queen Clarice (Julie Andrews) whispered the same line to Charlotte (Kathleen Marshall) during Mia's makeover by Paolo (Larry Miller).