From Thich Nhat Hahn:
Many of us worry about the situation of the world. We don't know when the bombs will explode. We feel that we are on the edge of time. As individuals, we feel helpless, despairing. The situation is so dangerous, injustice is so widespread, the danger is so close.
In this kind of situation, if we panic, things will only become worse. We need to remain calm, to see clearly. Meditation is to be aware, and to try to help.