You can rely on Newsround to tell you the important facts about a story - but some things you hear might be a bit scary or make you feel worried.
Remember that worrying stories are often in the news because they are rare - they don't happen very often.
It is incredibly unlikely that what you're reading about or watching might happen near you.
Discuss the stories with your parents or friends, or chat about it on the Newsround message board. You'll feel better that you're not the only one worried.
You could also talk to your teacher about it - maybe you could have a class discussion which would help you understand the issue better.