DEFENSETECH NOTES something that had occurred to me: Once again, London’s vast array of surveillance cameras was ineffectual at preventing terrorism:

Londoners are seen on the city’s vast amalgam of surveillance cameras an average of 300 times a day. Which means that the terrorists behind yesterday’s bombings almost certainly knew they’d be caught on tape — and went ahead with their attacks anyway. . . . As the AP, among many others, have noted, “the British capital’s ubiquitous closed-circuit TV cameras may hold the key to determine who was behind Thursday’s series of terrorist strikes.” But as a preventive measure, the 7/7 attacks have shown the spycams to be flimsy, at best.

Yes.