 Every summer, beachgoers risk their lives in an attempt to rescue someone struggling in the ocean. But without proper training, tragedy often occurs when the would-be rescuer ends up the victim. This is what's called a double drowning. Chief lifeguard Anthony Hipsley advises the first crucial step if a bystander sees someone drowning is to remain calm. Try not to panic. Make sure that 911 is called before doing anything else. The very best advice is to swim only at beaches with lifeguards present.