Michael Jackson's "Billie Jean" video is credited with breaking through the network's self-imposed color barrier.

迈克尔·杰克逊的“比莉”打破了音乐电视网自设的肤色歧视。

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Now t he New York Times has reported RIM leadership as one of the worst in 2011, because an installed base is no longer the competitive entry barrier Michael Porter waxed about in the early 1980s.

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Scotland's Minister for Public Health, Michael Matheson, said the judgement removed the "final barrier" to the act being implemented.

BBC: Tobacco display ban in Scotland to begin in April 2013

Many of the injuries were sustained when fans jumped onto the field from a barrier as high as 15 feet in places, said Michael Authement, director of operations for emergency medical provider LifeNet EMS. Others were stomped on in the push to get to the field, he said.

WSJ: Oklahoma State Football Melee Puts Security Under Scrutiny