this could be a beginning of a beautiful friendship
When Renault tries to arrest Laszlo as arranged, Rick forces him at gunpoint to assist in their escape. At the last moment, Rick makes Ilsa board the plane to Lisbon with Laszlo, telling her that she would regret it if she stayed -- "Maybe not today, maybe not tomorrow, but soon and for the rest of your life." Strasser, tipped off by Renault, drives up alone. Rick shoots him when he tries to intervene. When policemen arrive, Renault pauses, then orders them to "round up the usual suspects." He suggests to Rick that they join the Free French in Brazzaville. As they walk away into the fog, Rick says, "Louis, I think this is the beginning of a beautiful friendship".