Bombers attempt to attack London transit system | July 21, 2005 | HISTORY

On July 21, 2005, terrorists attempt to attack the London transit system by planting bombs on three subways and on one bus; none of the bombs detonate completely. The attempted attack came exactly two weeks after terrorists killed 56 people, including themselves, and wounded 700 others in the largest attack on Great Britain since World War II. The previous attack also targeted three subways and one bus.