It's important that you look for a GPS with lifetime map updates. This means that every year or so, you can go on the manufacturer's website and update your maps to reflect any changes. Automatic reroute is an essential feature found on every decent car GPS.
Dragon's Teeth (novel) The novel Dragon's Teeth, written in 1942 by Upton Sinclair, won the Pulitzer Prize for the Novel in 1943. Set in the period 1929 to 1934, it covers the Nazi takeover of Germany during the 1930s.
Dragon's teeth (fortification) Dragon's teeth near Aachen, Germany, part of the Siegfried Line. Dragon's teeth (German: DrachenzÃ¤hne) are square-pyramidal fortifications of reinforced concrete first used during the Second World War to impede the movement of tanks and mechanised infantry. The idea was to slow down and channel tanks into killing zones where they could easily be disposed of by anti-tank weapons.