When East Germans protested against their Communist autocrats in 1989, they were not assured of success either.

They tell us what interactions are allowed to happen.

Jones, Litt.D., and H.A.

Change cannot occur overnight.

And things can happen only if these interactions are perfectly balanced.

We've been trying to do it but it's probably not going to happen.

Risk of protests most likely occurring in Russia by region.

Globalization is not inevitable there have been setbacks before, and there can be setbacks again.

The nuclear power crisis at Japan s Fukushima power plant has served as a dreadful reminder that events thought unlikely can and do happen. It has taken a tragedy of great proportions to prompt some leaders to act to avoid similar calamities at nuclear reactors elsewhere in the world.

The nuclear power crisis at Japan s Fukushima power plant has served as a dreadful reminder that events thought unlikely can and do happen.

Gordon argues that the major technological changes that raised the standard of living in the past are much more important than anything that can happen in the future.

Three scenarios are possible for the Cotopaxi volcano s activity if there is an increase in magma.

Causes Miscarriage may occur for many reasons, not all of which can be identified.

That could happen.

Overlap can occur.

That can happen.

What could happen?

The ecological disasters that today s economic activity has already produced and the catastrophic potential of those to come have at last brought home the fact that energy policy and environmental protection cannot be separated.

The third and fourth scenarios can unfold even if the US remains the principal security anchor for Asia.

There are other measures that might help.

What else needs to happen?

That could happen.

How can this be?

What might happen next

How could that happen?

How could this have happened?

It's not supposed to happen.

That can't happen.

This shouldn't happen.

It could still happen.

How could that have happened?

What's going to happen now?

When's that supposed to happen?

How could that have occurred?

That may not happen.

And they're manipulable in ways that can produce some extremely positive outcomes.

Leaders can be sleepwalkers who fail to manage risk by, say, establishing institutions that can channel the rival interests and claims that fuel international conflict.

Instead, supervisors estimated only losses that banks can be expected to incur on loans (and other assets) that will come to maturity by the end of 2010.

It is a timely cautionary tale that alerts the audience to the relaxed presence of temptation in all of its forms and the dire consequences of succumbing.

This is not to say that terrible acts of Islamist terror could not happen in the US, or elsewhere.

You're never, there's just, juxtapositions are possible that just aren't, you don't think they're going to happen.

And there are Muslims, many Muslims out there, who are saying precisely this.

This is a more controversial one.

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They prefer patients who can't talk.