Boeing's Bird of Prey technology demonstrator, unveiled in St Louis on 18 October after spending a decade in the world of 'black' or classified programs, is a very important step in stealth technology, combining a very low radar cross-section (RCS) with a renewed focus on visual and even acoustic signatures. The overall goal, confirmed by officials at the event, is to achieve daylight stealth. The importance of the event was underlined both by the presence of the two top US Air Force (USAF) leaders – Air Force secretary James Roche and chief of staff General John Jumper – and by...