What is the last mission on GTA4

Jimmy Pegorino shoots your girlfriend or roman,dpending if you took the deal or revenge with Dimitriy(I chose revenge and your girlfriend dies),you follow his goons into an old casino,have a shootout,he takes off on a boat,you follow on shore with dirt bike,hit the ramp and climb into the helicopter roman and Jacob fly above you,you cahse his boat shoot at it,he crashes at the statue of liberty and you shoot him in the face(choose the ak-47 it looks awesome =P)