Complex sentence: Rashid who is visiting U.S. finds out through Ross that Rapp is not yet dead and orders his assistant Saudi intelligence agent Nawaf Tayyib to kill Rapp and Abel.
Split into simpler sentences: Rashid who is visiting America finds out through Ross that Rapp is not dead. Realizing this he orders his assistant Saudi intelligence agent Nawaf Tayyib to kill Rapp and Abel.