... to keep an eye on...
"China's foreign ministry berated Japan after the mayor of Nagoya told a delegation from Nanjing that a massacre of civilians by the Japanese in the Chinese city in 1937 probably never happened. Japan's occupation of China is an historically thorny issue for the two countries. Nanjing severed its sister-city ties with Nagoya in response. " February 2012, source: The Economist
disputed land border between two countries
impediment to Turkey's ascension to the European Union
see Trends in the Middle East and Arab states and Israel, Iran
while quiet now, the southern border of Russia with Georgia could potentially be a flash point again (?)
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