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Changing demographics in California predict a 67% increase in seniors, from 6 million to 10 million, in the next 20 years. 2010 will bring a the most significant increase in people over 60 that we've seen so far. What kind of support is most needed for seniors in San Diego? And how do you think San Diego needs to prepare for a significant increase in an older population?

There is a growing body of research connecting happiness to volunteerism and contributing to something that is bigger than yourself. In many cases, that means giving to charitable organizations. We discuss why people give and what draws us to give to one group over another.

Researchers at Intel and the University of California at Santa Barbara say they have created a new kind of silicon-based chip that can produce flashes of laser light. Such optical chips could eventually lead to faster computers and telecommunications networks.

A number of U.S. service members have fallen ill after returning home from the wars in Iraq and Afghanistan. Some believe their ailments are caused by exposure to toxic open-air burn pits located at military bases throughout the warzone. Journalist Matthew LaPlante discusses his three part series, "Sickened by Service," which ran this month in The Salt Lake Tribune.

How is the internet increasing learning opportunities for people, and revolutionizing education around the world? We speak to the author of the new book "The World is Open: How Web Technology is Revolutionizing Education."

How prevalent is cheating in school nowadays, and what can be done to prevent it? We speak to the authors of the new book "Cheating in School: What We Know and What We Can Do," about maintaining academic integrity in the 21st century.

Round Two: Yawn

Male circumcision is one of the oldest medical procedures known to mankind. Despite the popularity of the procedure, there is a lot of opposition to neonatal circumcision. We speak to a local journalist, an urologist, and a member of the "intactivist" community about the arguments for and against male circumcision.

How have San Diegans reacted to the political unrest in Iran, which has led to public killings and violence? We speak to Iranian-Americans living in San Diego to get their perspective on the situation.

Still Hung Up on 2000