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System accident — A system accident is an unanticipated interaction of multiple failures in a complex system. This complexity can either be technological or organizational, and often is both.[1] A system accident can be very easy to see in hindsight, but very… … Wikipedia
MESSENGER — This article is about the NASA space mission. For other uses, see Messenger. MESSENGER Artist s rendering of MESSENGER orbiting Mercury. Operator NASA / APL Major contractors APL … Wikipedia

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