Clearly the intelligence efforts on such a scale must provide some return in terms of stopping terrorism or they would not be worth the cost. However it is open to question whether the impact has been nearly as big as had been cited by the intelligence agencies. We clearly don’t know if these terrorists would have been detected through other methods. Additionally in at least one case where the FBI and NSA have stated that electronic surveillance has played a key role it has turned out not to be the case. FBI deputy director Sean Joyce has claimed that an attack on the New York Stock exchange was foiled by electronic surveillance; “We went up on the electronic surveillance and identified his co-conspirators” yet the emails involved were perfectly ordinary – the only information gained from the broad brush surveillance was that the plotter was in contact with al Qaeda leaders in Yemen. Something which surely could have been caught the other way around – by looking at the al Qaeda leaders communications. [1] Other cases such as that of Basaaly Moalin who was convicted of sending $8,500 to support Somali terrorist group al Shabab that have been highlighted by the NSA have similarly not required such broad surveillance. [2]  [1] Ross, Brian et al., ‘NSA Claim of Thwarted NYSE Plot Contradicted by Court Documents’, ABC News, 19 June 2013,   [2] Nakashima, Ellen, ‘NSA cites case as success of phone data-collection program’, The Washington Post, 8 August 2013,