Early Start with John Berman & Christine Romans

Missiles to be mounted on London rooftops in advance of Olympic Games – Nic Robertson explains

When the Summer Olympics get underway in London later this month, Britain's Defense Department confirms there will be missile launchers positioned at six locations around the city to protect the games from terrorists.

Two of those surface-to-air missile sites will be located on top of apartment buildings, despite protests from residents.

Nic Robertson explains this plan this morning on "Early Start," and if there are any credible threats against the games .