Rifleman Luke Lawrence will act as one of those guardian angels, but insists that the threat of insider attacks is minimal.

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He was surrounded by guys in Mets and Yankees caps in a phalanx of guardian angels.

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Yet in some sense, Escriva insisted, the blueprint for Opus Dei was contained in that original experience on the Feast of the Guardian Angels in 1928.

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He also said there had been some success with the use of "guardian angels" - Nato soldiers who provide a round-the-clock armed guard for their colleagues while they are training their Afghan counterparts.

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Digital devices will act as our guardian angels and an array of gadgets will shadow our lives.

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