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Felipe Calderon arrives at a time when criticism of his deadly drug war is increasing, his political party is faltering and the Mexican economy is attempting to claw its way back after the global economic meltdown of 2009.

Davis Guggenheim helped galvanize public interest and concern about global warming through his documentary An Inconvenient Truth. Now he's hoping to do the same for education reform with his latest film, Waiting for Superman. But is the film's take on education reform too good to be true?

Airs Monday, March 22, 2010 at 10:30 p.m. on KPBS TV

Social networking has almost doubled among people older than 50 in the past year, with 42 percent of seniors participating in the hot Internet trend. Using Facebook and other sites, seniors build support networks that help them begin a second career, prepare for retirement or deal with health issues, a Pew report finds.

Airs Wednesday, December 28, 2011 at 9 p.m. on KPBS TV

The old saying "sleep tight - don't let the bed bugs bite" isn't a figure of speech anymore. Bed bugs are crawling over mattresses, in crevasses and carpets across California and the country! Heading into the busiest travel week of the year, bed bugs are reportedly hitchhiking with airplane travelers. Why is San Diego playing reluctant host to this persistent pest and what can we do about it?

Airs Sunday, May 23, 2010 at 3 p.m. on KPBS TV

After several rounds of last-minute diplomacy at the climate change talks in Copenhagen, President Obama announced that he had reached a "meaningful and unprecedented breakthrough" with the key developing nations of China, India, South Africa and Brazil. The countries say they will work to limit global warming to no more than a 2-degree Celsius increase over the next decade.

Justice Department spokesman Matthew Miller said the appeal is expected this week. On Monday, a federal judge ruled that the stem-cell research violated the will of Congress in prohibiting the destruction of human embryos.

How did President's Day come about? Who – and what – does it celebrate? How has its meaning changed over the years? Host Tom Fudge finds these answers from a local political science professor.