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 was resolved, Berry was recast 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, for which it is the codename for Queen Clarice(Julie Andrews).
When Hilary Swank's character, Claire, hands the duties off to Hector Elizondo's character, Kominsky, she whispers in 'Chris 'Ludacris' Bridges'' ear, "Watch him like a Hawk." In Garry Marshall's earlier film, 'The Princess Diaries (2001)' (in which Elizondo also starred), Julie Andrews' character, Clarice, whispers the same line to Kathleen Marshall's character, Charlotte, during Mia's makeover by Larry Miller's character, Paolo.