Tony Stark (film)/History/The Avengers

Fixing the Stark Tower
Tony builds the Stark Tower and joins the Avengers in defending the world from Loki and the Chitauri army. He briefly battles Thor using the Mark VI and defends the Helicarrier from an attack by Loki and his minions. Tony saves the Helicarrier by restarting one of its engines, but the Mark VI is badly damaged in the process. After Phil Coulson is killed by Loki, Tony becomes determined to save the world and Phil finally earns his respect. Realizing Loki will launch his attack from Stark Tower, Tony travels there and confronts Loki, swearing that if they can't save the world, the Avengers will avenge it.

As the Mark VI is too badly damaged to do much battle, Tony dons the new Mark VII which is incomplete. Tony does battle with the Chitauri army and is able to help hold them off, but more keep coming through a wormhole Loki creates with the Tesseract. Nick Fury's desperate superiors launch a nuclear missile at Manhattan in a desperate attempt to stop the invasion.

Seizing the chance to both stop the invasion and save Manhattan, Tony flies the nuclear missile through the wormhole and into the Chitauri flagship, destroying it and disabling the forces on Earth. The Mark VII runs out of power and falls through the closing wormhole to Earth, but Tony is saved by the Hulk. Tony later repairs Stark Tower with Pepper and builds rooms for the rest of the Avengers.