The Obama administration has forced a US maker of fibre optics to abandon a planned joint venture with China's Tangshan Caofeidian Investment Corporation because it believes the tie-up would threaten national security.
The decision by the White House to scupper the move represents the second time in less than a year that the administration has sought to block a transaction involving a Chinese company because of security concerns.
It also offers a rare glimpse into the administration's handling of sensitive acquisitions following a drought in cross-border deals during the financial crisis.
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