Good morning to everybody. I am Iliano Cervesato, one of the Program Chairs of LPAR'08 and coordinator of the the conference on the ground. As such, please come to see me, or anybody with a red ribbon on his/her badge, for any question you may have. I already know what the first one is going to be: "how do I get on the Internet?". Connect to the QFLink wireless network and log in as a guest (but use distractions sparingly). Welcome to the 2008 edition of LPAR, the 15th International Conference on Logic for Programming, Artificial Intelligence and Reasoning. Over the last 15 years, LPAR has grown to become one of the most sought-after meetings in computational logic in the conference circuit. It is a laid back forum for researchers around the world to present their work, to discuss advances in the field, and to interact with other researcher. LPAR'08 has more than fulfilled this mission: we have delegates from more than 20 countries in this room. Please make sure to talk to all of them! It is wonderful to see so many of you here, especially since this is only the second time that a scientific conference in Computer Science takes place in Qatar. Many of you, like me a couple of years ago, had to look up on a map where exactly Qatar was, and I hope that, like me, you will be mesmerized by the grandiose experiment in education and research that is taking shape here. We, at Carnegie Mellon University, are proud to be part of it, and we are glad that you too are part of it. In spite of taking place in a little known (for now) corner of Asia, LPAR'08 has attracted many more submissions (154) than any previous edition of LPAR, and out of these, the Program Committee has selected 45 presentations and an additional 14 short talks, which will be presented over the next 5 days. In addition, 3 of the most influential researchers in computational logic security have graciously accepted to give invited talks. Specifically, 2007 Turing Award recipient Ed Clarke, Thomas Eiter and Michael Backes. A fourth speaker, 1996 Turing Award recipient Amir Pnueli regrettably had to cancel his participation at the last minute for personal reasons. Welcome to LPAR'08, welcome to Carnegie Mellon University, welcome to Education City, welcome to Qatar!