Can you help on the following questions? All the answers contain the word AIR in them:
1) UK National Park (10)
2) Hit for Led Zeppelin (8,2,6)
3) Noisier angel could be fatal (12)
4) Baron hail tool (3,3,7)
5) Steps for a vehicle on the West coast rail line (9)
6) Military helicopter in the American TV series was code named this (7)