(Global Pulse: March 11, 2010) This week Global Pulse revisits China and its relationship with the U.S. and the world, from our 2009 Year-End Special. This overview of China's changing role in the turbulent global economy includes an interview with Wayne Silby, chairman of the board of Calvert Social Investment Foundation, and an unusually deep look at China as portrayed by CCTV, Chinese state television.

SOURCES: CCTV, China; Al Jazeera English, Qatar; Fox News, U.S.; CBS, U.S.; BBC, U.K.

(Global Pulse: February 26, 2010) The U.S. isn't the only country with an obesity problem. This week's Global Pulse looks at the tactics being deployed worldwide by nations facing an epidemic of obesity. Looking to combat unwanted effects of our modern era's sedentary lifestyle, countries are harkening back to the salad days with campaigns encouraging exercise for adults and children, and the avoidance of fatty foods. As these broadcasters make clear, tackling the problem of childhood obesity requires parental involvement and better access to healthy food.

SOURCES: ABC, U.S.; Once Noticias, Mexico; RT, Russia; France 24, France; Al Jazeera English, Qatar; KBS, South Korea

(Global Pulse: February 12, 2010) Nigeria's president has been in a Saudi hospital for months, and the people and government of Nigeria are wondering who is in control. While President Umaru Yar'Adua seeks medical treatment, there have been mass protests, rowdy government debates, and a severed cease fire with Niger Delta militants, who have now gone back to disrupting Nigeria's oil and gas exports. Vice President Goodluck Jonathan is now officially in command, but even the legality of that is in question.

SOURCES: AL Jazeera English, Qatar; TV5, France; Press TV, Iran; BBC, U.K; African Independent Television, Nigeria

(Global Pulse: January 29, 2010) Despite the epic nature of the disaster in Haiti, this overview of worldwide news coverage of the earthquake reveals that media still found time to commend their nation's rescuers, promote their own star journalists, and even get in some digs at the U.S. While the coverage raised awareness and donations for devastated Haiti, these clips from media around the world show a fine line between compassion and self-promotion while thousands go without food or shelter. This episode also includes an interview with The New Republic's Senior Editor Noam Scheiber.

SOURCES: KBS, South Korea; Al Jazeera English, Qatar; RT, Russia; TV5, France; CNN, U.S.; CBS, U.S.; ABC, U.S.; FOX, U.S.; The New Republic, U.S.; Health News Review, U.S.

(Global Pulse: January 15, 2010) The 1991 START treaty limiting U.S. and Russian nuclear weapons expired in December, but expectations for a reduction in arms remained high. Since then, the picture has been clouded by a push for weapons modernization by American conservatives, and new criticism from Russia's prime minister, Vladimir Putin -- who may be playing to the crowd with his eye on the next presidential election.

SOURCES: RT, Russia; CCTV, China; Reuters, U.S.; CBS, U.S.; Al Jazeera English, Qatar; BBC, U.K.; New York Times, U.S.; The Moscow Times, Russia.

(Global Pulse: December 2, 2009) China and the U.S. may be patting themselves on the back for proposing CO2 emission cuts, but African nations are boiling mad. Africa accounts for 14% of the world's population, but emits only 3% of its CO2. Amid floods in the continent's east and drought in the west, Africans accuse the developed world of timidity, and some are calling for climate reparations. After watching, tell us what you think on Real Conversations, and participate in our Climate Change News Hunt with NewsTrust.

SOURCES: Al Jazeera English, Qatar; BBC, U.K.; CCTV, China; NTV, Kenya; TV5, France; SABC, South Africa