 Complete the following phrase:  It is located on the banks of River Alakda in the hills of Himalayas. It is very important airport during emergencies. Because of its location on one of the largest pieces of flatland in the mountainous region of Uttarakhand, a 4,000 ft airstrip was constructed at Gauchar in 19982000 and later upgraded. Gauchar Airport was a vital staging area for rescue and relief efforts following the disastrous 