1. Go up the ladder inside. Destroy the explodable tank up there. Walk near the tank (stay on the right side), jump on one of the 2 chimney vents (silver bulb shaped things), jump onto the higher level where the exploded tank is, walk around to the other side and hide in the flames coming from the exploded tank.

2. Climb the orange 'emergency shute' on the side of the Jet. Jump left onto the wing of the plane. Camp at the back of the wing or run down the wing and jump onto the boxes there or across to the building (where you can climb up the green thing to get on that part of the building).