Aerials show moments before bombing suspect caught

Moments before the bombing suspect Dzhokar Tsarnaev was captured Credit: Massachusetts State Police
The boat in the backgarden in Watertown Massachusetts.
The boat in the backgarden in Watertown Massachusetts. Credit: Massachusetts State Police
The boat containing bombing suspect Dzhokar Tsarnaev
The boat containing bombing suspect Dzhokar Tsarnaev Credit: Massachusetts State Police
The boat containing bombing suspect Dzhokar Tsarnaev
Boston bombing suspect Dzhokar Tsarnaev seen inside the boat in Watertown, Massachusetts. Credit: Massachusetts State Police

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Boston bombs 'remote trigger'

US investigators have revealed the two bombs that went off at the Boston Marathon were detonated with the kind of remote control device used for a toy car.