Confusion over Russian spy network

The round-up of 10 suspected spies in the United States is causing as much confusion as consternation, with many questioning why so many people spying for so long apparently produced so little in the way of intelligence.

The alleged Russian citizens lived for years in the United States, many under assumed identities.

But according to experts, the information they sought was readily available.

Al Jazeera's Nick Spicer reports.