Rescuers help a man wounded near a London tube station in a series of attacks on the city's transit system, July 7, 2005.
Several explosions rocked London's transportation system Thursday morning. The London subway has been shut down, and a bus destroyed. The explosions coincide with the G8 summit in Scotland, hosted by British Prime Minister Tony Blair.
Host Renee Montagne reports on the latest developments. We hear eyewitness accounts. Also, President Bush responds to the explosions.