New Delhi, March 17: The Indian Air Force has begun its biggest air exercise named "Live Wire" by activating all its bases from Leh in the north to Car Nicobar in the deep South. This is said to be the biggest air exercise in six years with fighters, helicopters, transport aircraft and Airborne Warning Systems AWACs and mid-air refuellers taking part. The execise began on Saturday. Such an air exercise is held normally after every five to six years.There will be different stages in the exercise and it will involve live firing at certain ranges. With the planned induction of 126 multi-role combat Rafale fighters from Dassault, the IAF's fire power will increase immensely.Also, the first super heavy C-17 Globemaster aicraft will be inducted this year.Last month the IAF had held the Iron Fist exercise in Pokhran, Rajasthan.