Korva Coleman reading the headlines on Saturday Weekend Edition stated that the British police had found and defused two "powerful" car-bombs.
Powerful? I'm VERY pleased that these cars loaded with gasoline (apparently about 50 gallons) and propane tanks and nails did not detonate and were disarmed--that is great! But perspective and information is what NPR should be providing, not information that hypes the threat.
A more accurate description would be "crude" car bombs as opposed to truly powerful car bombs of the ammonium nitrate sort that was used in Oklahoma City or the high-explosive types used in Iraq.