Look for First Aid
Lara is badly hurt, leaving her with limited mobility. Walk forward until she falls and slides into a shanty style town and spots a helicopter. [100 XP]
Search the Rescue Helicopter for Medical Supplies
Look to your left to find some Salvage and proceed straight through a sewage tunnel. When you exit, shoot the Solarii on the wall high above and then deal with the remaining Solarii. Approach the salvage to be caught in a snare, shooting the pulley to drop Lara and the Salvage itself.
Head up the steps to some Salvage and then turn left and follow the walkway and hop across the gap. More Soalrii attack when you land and there is a sneaky man with an assault rifle around the corner. You can then enter the helicopter to find the Lighter and the ability to create Fire Arrows . [100 XP]