Colombian and United States authorities called it one of the worst instances of terrorism tied to the drug trade.

"We feel in the worst instance prices will stabilize or perhaps decrease, but not like eight or nine years ago," he said.

In the worst instances, a city might even be forced into bankruptcy if it could not deliver on its promises to retirees.

In the worst instance, they hold sessions indoors to practice putting and hitting with whiffle balls.

The incident was one of the worst reported instances of violence in months.

In particularly bad instances, an experience may leave a mark upon them.

In the worst instances, marines and soldiers ended up killing youngsters under dubious circumstances.

What can we learn from those bad instances?

Other industries have far worse instances of difficulty which do not get the same attention as anything to do with the word 'nuclear' .

Some have called it a "suicide headache" in the worst instances.