Find out what has our nation's bio-terror experts most worried. Is America really prepared for large-scale germ warfare? Dr. Oz walks you through a deadly scenario. Learn what you can do to stay safe. Click here to take the first aid quiz and see how well you’d do in an emergency.

Click here to watch Part 1.

Click here to watch Part 3.

Want to know how to look marvelous without splurging so much? Dr. Oz invites three beauty experts to share the smartest ways to save money while looking fabulous starting from your hair and makeup tools to the beauty products you use.