The first trial run demonstrated that 1 km of high-density polyethylene pipe could be laid down over mountainousterrain and in windy conditions in just nine minutes.
Given the reluctance of western governments to face the messiness of ground warfare in mountainousterrain, military aid to Montenegro would presumably take the form of air support.
He officially retired in 1990 but was lured back to work to build the Konkan Railway, which runs through mountainousterrain to connect strategic ports in Mumbai and Mangalore.
Then back on the bikes to continue an ordeal that started before dawn with 35 miles of orienteering through mountainousterrain, followed by a rappel down a 250-foot cliff.
He walked 1, 028km (640 miles) in 20 days from east to west Nepal and the following year he trekked about 300km from north to south in nine days -- a tougher walk because of mountainousterrain.
Yet the Afghan air force has limited strength, so Nato air support is considered crucial, especially for operations in harsh terrain and mountainous areas, our correspondent says.