Don't watch the news too much, hug and explain in a simple way. This will create a calm reality for your children and lower the stress level.
Don't listen to the radio next to the children or leave the TV on all the time on the news channels. It is possible to give the child an active role. The role gives meaning and as much as the child has a role he is not hysterical because he has something meaningful to do in the emergency situation. Parents also have an important role – to convey inner calm to their children.