I've been watching BBC News 24 since 0800 today, and no such report has been mentioned. At a time when the US would want to publicise any success it had against terrorism, and when the US people would inundate the media whan even a suspicious-looking sparrow fell out of the sky, I think the idea that the crashes of four large aircraft could be or would be suppressed is not credible. I think a local junior hack has been watching 'Independence Day' just a bit too much.