Construction on more than 10 percent of 1,306 planned skyscrapers was on hold at the end of June 2009, and there were 11 percent fewer such projects under way compared with January 2009.  Mega-projects -- skyscrapers at least 100 meters (328 feet) tall -- have joined the residential housing market in recession.  There were 1,165 skyscrapers under construction around the world in June 2009, down from 1,307 in December 2008. ...more