You'll need to head back to the prison car at the end of this mission in The Saboteur for the Xbox 360. The ninth mission in Act 2: Rolling Thunder is where you need to talk to Bishop, and then find Skylar near the Arc de Triomphe. This is a big mission. First, Skylar goes with you to sabotage a bridge. You need to find the four points (highlighted with red lights) to plant sabotage. You're not using dynamite this time. You'll see little ghosts of the sabotage at the exact points to plant the charges. You'll have to climb to reach some of them. For more info, watch the whole gameplay.
This is a "The Saboteur" walkthrough for Act 2: Mission 9 - Rolling Thunder.
Mahalo's "The Saboteur" Walkthroughs are more than enough information for you to play the game yourself, and they teach you everything you need to be prepared. They lead you through the world of Saboteur and all of the tricks and achievements you will need to conquer along the way, moving from chapter to chapter. This video walkthrough focuses on Mission 9 in Act 2 (Rolling Thunder).
The Saboteur by Pandemic Studios is the open-world action-adventure video game available for the Xbox 360 and PlayStation 3 consoles, along with Microsoft Windows. Avenge the loss of your loved ones by hunting down your sworn enemies in Nazi-occupied Paris during World War II. Fight, climb, and race your way through this unique world to destroy the lives of those that have taken everything from you. Enter the seedy world of a saboteur living in a stylized 1940's Paris, where the women are sexy, the missions are epic, and the revenge is satisfying.