Please read this Trisell and others who are so concerned about who did what first. <a href="http:&#x2F;&#x2F;www.theverge.com&#x2F;2015&#x2F;11&#x2F;24&#x2F;9793220&#x2F;blue-origin-vs-spacex-rocket-landing-jeff-bezos-elon-musk" rel="nofollow">http:&#x2F;&#x2F;www.theverge.com&#x2F;2015&#x2F;11&#x2F;24&#x2F;9793220&#x2F;blue-origin-vs-sp...</a>