 Hello, my name is Vince Cerf. I'm Vice President and Chief Internet Evangelist at Google, but for purposes of this call, I'm also a member of the Interplanetary Chapter of the Internet Society. From time to time, I have an opportunity to work with my colleagues at the International Center for Theoretical Physics, not about the physics side of things, since I'm just a computer engineer, but about radio and communications. And your meetings today have, as a central theme, going through them, radio-based communications. And here, we get to a most important point, which is the whole day on delay and disruption tolerant networking. My good friend, Samo Grasic, is going to be speaking to you and representing our Interplanetary Chapter and his experiences, very unusual experiences, with the use of delay and disruption tolerant networking. Where did all this come from? Well, it began in 1998, as a small group of us at the Jet Propulsion Lab began to contemplate, what should we be doing that will be needed 25 years later? And we concluded we should be thinking about the design and construction of an interplanetary backbone network to support manned and robotic space exploration. Well, here it is 25 years later. And lo and behold, we are in the process of returning to the moon, as many of you know. In the US, it's called the Artemis Missions, one of which has already circumnavigated the moon and more to come with landings on the moon sometime in 2025 or 2026. So why are you going to talk about the DTN at all? Well, it's a very important kind of protocol that operates in a parametric space well outside of the one for which TCPIP was originally designed. And Samo, who can tell you that his experiences fall squarely in the middle of that unusual parametric space, will illustrate why it is that we need to contemplate these alternatives to the conventional internet protocols that are so broadly in use today. So I hope that you'll find his work and his explanation of our work of interest to you as you consider environments in which communications is not exactly reliable. It's not continuous. And it's not always necessarily even high speed. Although these protocols have been designed and tested at both lower latencies where interaction and real time communication is possible and also at very high speeds using optical rather than radio based communication. So I hope that you'll find Samo's presentations of interest. And I hope you'll also come back to us with your ideas for how we can use these protocols in applications that might have terrestrial utility. Sorry, I can't be there in person. But perhaps our paths will cross on the net.