The World's Jason Margolis takes over the reins of the Tech Podcast this week. A symphony from Kiev about nuclear ambitions in Iran. Also, a story about the online virtual world, Second Life. A few water-related pieces on the program: Irrigation fights in Greece and a jellyfish boom in the Mediterranean. Last, a piece about the crackdown of Internet usage in Europe to fight terrorism. And some music from new featured artist: Mobius Operandi.