Rick Steves writes European travel guidebooks and hosts travel shows on public television and public radio. He’s in town for the Los Angeles Times Travel & Adventure Show this weekend. We ask him for the best travel tips for Europe in 2011.

Ian Hore-Lacy is the Director for Public Communications of the World Nuclear Association. We discuss the Fukushima Dai-Ichi nuclear plant in Japan to understand the lessons from the disaster.

Peter J. Shield has spent his life investigating unexplained mysteries—both in the United States and abroad. He’s the host of the popular radio program Dr. Peter J. Shield’s World of Unexplained Mysteries. We examine some of the world’s greatest archaeological sites and discuss what influence—if any—aliens had on their construction.

Jim Mahaffey has a doctorate in nuclear engineering and is author of Atomic Awakening: A New Look at the History and Future of Nuclear Power. We investigate the meltdown at the Fukushima Dai-Ichi nuclear plant in Japan following the earthquake and tsunami to discover if nuclear power is safe.

Ava Avedissian gives us recommendations that could save our lives during an earthquake. Friday morning, there was a magnitude 8.9 earthquake in Japan. We still don’t know that damage or the casualties this earthquake caused, but you can imagine it will be extensive.

Taking simple precautions before an earthquake strikes may mean the difference between surviving and being a statistic.

John Hamm is a venture capitalist with a strong track record of successful technology start-ups. He excelled in leadership/operating roles at several high-growth companies and now has his own CEO advisory practice in the Bay Area. He discusses what leaders need to know to be Unusually Excellent.