The big guns are ready to boom if required in this high-altitude region. Ahead of the artillery and air defence gun positions, companies of acclimatised and well-armed soldiers guard the forbidding terrain along the frontier, where temperatures have already dipped to minus 3 to 5 degree Celsius.The big guns are ready to boom if required in this high-altitude region. Ahead of the artillery and air defence gun positions, companies of acclimatised and well-armed soldiers guard the forbidding terrain along the frontier, where temperatures have already dipped to minus 3 to 5 degree Celsius.