Following breaking events, such as the situation now in Ukraine, is a great strategy to drive traffic to your site.  Also it's just another way to provide real content to your web users.

Don't just post links or inappropriately use hot keywords - in this case, 'Ukraine' or 'Russia' - talk about the event.  Link to some articles, quote them, and get involved.  Ask your users for feedback.

Checkout the below infographic depicting the Ukraine crisis:

Ukraine crisis from Kiev to Crimea

Ukraine crisis from Kiev to Crimea