 Complete the following phrase:  Next, he boards an Algerian passenger plane and flies north to Hassi-Messaoud, an oil extraction and refining town; a man-made luxury oasis in the middle of the desert. From here the trip jumps to Libya, normally closed to western TV crews. To gain entry, Michael Palin and his team have joined up with a British veterans tour, and he mingles with the 80-year-old former Desert Rats who reminisce about the 