The more difficult diplomatic challenge may be dealing with China.

Who would respond better to all the diplomatic challenges of coming years?

Inside the Obama administration s struggle with its biggest diplomatic challenge.

The affair became a diplomatic challenge as the foreign press took note and sided with the Italians.

Neglected no longer, India now presents Washington with its most serious diplomatic challenge.

Indeed, securing supplies could become a diplomatic challenge for Beijing.

But already the focus of attention seemed to be shifting to the political and diplomatic challenges ahead.

The attempt to control and if possible reverse this growing antagonism is clearly one of the major diplomatic challenges facing the Bush administration.

And now here she was, entrusted with perhaps the most vital diplomatic challenge in Earth history-let alone her career.

This stage would obviously add serious diplomatic challenges to an already complicated scientific protocol.