The 20th century saw air power transformed from novelists' fantasy into stark reality. From string and canvas to precision weaponry and stealth, air power has progressed to become not only the weapon of first political choice, but often the only conceivable option. This rapid development has given rise to considerable debate and controversy with those holding entrenched views rarely slow to shout their case. Many myths have grown over the period, ranging from the once much vaunted ability of air power to win wars alone through to its impact as a coercive tool.