After two years of crashing banking systems and economic recession, the euro zone enters 2010 with a full-blown debt crisis.
The European Commission warns that public finances in half of the 16 euro-zone nations are at high risk of becoming unsustainable.
Governments will spend the next year and beyond balancing the urgent need to fix public-sector debt and deficits -- without imperiling what appears to be a feeble economic recovery.
Even the staunchest optimists in Brussels and Frankfurt see a rocky process, with rating firms poised for more downgrades and bond markets meting out daily judgment over how governments are doing.