NATO Secretary General Anders Fogh Rasmussen addresses the media at NATO headquarters in Brussels, Friday Dec. 4, 2009.

Video. Europe 'not off the hook' with Biden on defence spend, says Rasmussen

EU Leaders may be relieved that Biden will do whatever it takes to restore traditional transatlantic ties but this doesn't mean that U.S. priorities will dramatically change. For Rasmussen, China, as rising power, is the biggest challenge.

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