Maybe somebody will have some information about a thing that i notice in the different designs of the "Dragon capsule" that we can see in the internet. I notice that, unlike Mercury, Gemini, Apollo, Orion, Soyouz and Shenzou capsule, the Dragon capsule doesn't have the system of emergency to extract the capsule in case of launch failure. So, what is the system that Space x offer to secure the crew in these cases.