With some of the sunniest and hottest days of the year still ahead of us, Dr. Johnathan Karp and student producer Kaya Basatemur set out to talk about the main causes of skin cancer and how to prevent yourself from getting it. Today, we answer all of your burning questions-- What SPF sunscreen should you really be using? Is there a benefit to UV protective clothing rather than sunscreen? Are tanning beds actually that bad for you? How would you even know if you had skin cancer? These answers and more when you tune in to this week's episode of Health 411.