Terror packages from yemen. International Security Alert

Saudi Arabia warned U.S. about suspicious packages, several packages containig explosives (PETN) were sent from Yemen to United Kingdom and United Arab Emirates, the final adress was the U.S..
A manipulated cartidge was found in a plane bound to go to the U.S., and another was found in FedEx facility in Dubai also adressed to the U.S.. Two of the packages were adressed to two Chicago Sinagogs.
Al-qaida must be behind the plot.
Authorities are searching planes in the U.S. and abroad for more packages as of now.