http://jamestown.org/terrorism/news/article.php?articleid=2369778
Paul Tumelty
"The apparent attempted suicide bombings in London on July 21, exactly two weeks after the attacks that left over 50 dead, provided the Metropolitan Police, in commissioner Ian Blair's words, with its 'greatest operational challenge since the Second World War.' The attacks, which the authorities maintain were intended to kill, dealt an unprecedented blow to the psychological state of the capital and again cast doubts upon the security services' ability to track active terrorist cells."
