While many hope the improved transatlantic coordination will stop the downward slide, recession looms over both sides of the Atlantic like a dark cloud.

NPR: European Rescue Plan Being Ironed Out In Brussels

Conversely, there is a widely held view that aging hangs like a dark cloud over individuals, families, communities and many countries in the developed world.

FORBES: The Longevity Economy: From The Elderly, A New Source Of Economic Growth

It's a huge towering dark cloud, shaped at the top like a blacksmith's anvil, and responsible for sudden downpours.

BBC: Weather talk: Is there a way to make it interesting?