All these divers had years of experience. They where dive masters and instructors, some with as much as 20 yrs of diving under their weight belts, and had penetrated the wreck on previous occassions. All this can only further prove that anything can go wrong at anytime while we dive. We should never get complacent while enjoying this great sport of ours. Even the easiest or most familiar dive can turn deadly. Remember, even in warm, crystal clear waters, at shallow depths, diving is and always will be an extreme sport and must be treated as such. Keep up your training, stay fit to dive and practice, practice, practice. Something can be learned on every dive. When you stop learning or think there is nothing left to learn, you put yourself and your dive partner at risk. My heart goes out to their families and friends. Let`s not forget this lesson, you can do everything right and still run into problems that will test every last bit of your knowledge and skill...