http://news.bbc.co.uk/2/hi/uk_news/4778575.stm
Apparently up to 10 planes were targeted in the plot, and 21 arrests have been made in the UK. That said, they haven't gotten the "key targets" who are still at large. According to the news here they had brought assemblable explosive gears in innocuous items such as Ipods and cans of soda.
If you're flying to the UK, especially if you're coming from NA, today's not your day. You can't bring carry-ons on the flight, and there will be some intense security.
Good morning and welcome to today's news story.