London on Lockdown, Obama in Cadillac One

While London beefs up security for the upcoming G20 summit, there's already been one scare. Authorities arrested five activists suspected of plotting a bomb attack during the meeting of world leaders. Police found the three men and two women with weapons and extremist material.

President Obama will arrive in London today, and protesters from all over Europe should be on hand to greet him. The American president won't be taking any cabbies in London. Instead he'll ride in his heavily-armored, bullet-proof Cadillac One.

The leaders will meet Wednesday and Thursday to discuss the international response to the economic crisis. Residents who live near the Excel Centre, where the meetings will take place, will have to carry two forms of ID in order to return to their homes.

I have to say: this is one international event I'm not sad to miss in person!