The shootings at Virginia Tech have raised the question of how vulnerable Americans remain to attacks here, whether from a lone gunman or from an organized terrorist network. The World's Katy Clark posed that question to terrorism experts.

Anchor Lisa Mullins speaks with the BBC's Phil Mercer in Australia about reaction there to the Virginia Tech shootings. Australia passed tougher gun control laws following a shooting spree years ago in Tasmania. The country's prime minister offered his condolences to the victims' families in Virginia, and said he hoped tougher laws would never allow something like that to happen in

Correspondent Ben Gilbert reports on a competition broadcast on Arab satellite TV where poets face off in the style of American Idol. The program has the popularity of American Idol, too.

A UN conference in Geneva is focusing on the issue of Iraqi refugees. The UN estimates some 50,000 Iraqis are leaving their country every month. Some 4 million Iraqi refugees are believed to be living abroad, many in difficult straits. The BBC's Imogen Foulkes reports from Geneva.

Liviu LibrescuThe World's Aaron Schachter reports on one of those killed in the shootings at Virginia Tech. Professor Liviu Librescu was an Israeli citizen originally from Romania. He was reportedly killed trying to stop the gunman from entering a classroom.

Authorities reported today that the suspected shooter in yesterday's massacre at Virginia Tech was a South Korean student living in the U.S. Anchor Lisa Mullins speaks with Dae Young Kim, a professor in the Sociology and Asian American Studies program at the University of Maryland, about how the US Korean community is reacting to the news.

Anchor Lisa Mullins speaks with Washington Post Reporter Ian Shapira at Virginia Tech, the site of a shooting rampage that took the lives of 32 people there yesterday. Today, police officials identified the shooter as a 23-year-old South Korean national who was a student at the school.