Do you worry when you get an email from someone you don't know? Should you click on it? When it comes to the internet today, it's hard to know what's OK to do and what's not. When America's enemies are known to be hacking and attacking us as a country, and when there are risks to all of us each time we turn on our phones, tablets and computers, it's important to know what's safe and what's risky behavior. In this edition of Greta Talk, Greta van Susteren turns to Morgan Wright, a cyber expert and frequent guest on On the Record and asks some of the hard questions... and the answers she gets will help everyone listening. This is a session everyone should hear.