Three people are reported to be injured today after shots were heard at Lone Star College in Texas.
If overhaul of America's healthcare system defined Barack Obama's first term, then the consequences of the massacre at Newtown may well define his second. Channel 4 News assesses his chances.
If the first term is all about making an impact, the second term is about the legacy. For Obama - still weathering an economic storm - gun control has forced itself to the top of his agenda.
President Barack Obama announces a host of measures to crack down on gun violence following the deaths of 20 children at a primary school in Connecticut.
"Congress needs to examine its conscience", President Obama has declared - promising a range of measures to control gun violence, including a "meaningful" assault weapons ban.
Quentin Tarantino told Channel 4 News that movie violence is a fantasy, with no link to real-life violence. But the director has admitted in the past that people are affected by on-screen aggression.
More than a hundred scientists from America's top universities have warned that the pro-gun lobby is hampering the search for a solution to firearms violence, in an open letter.
After the Connecticut school shooting: the search for blame. Media bosses say it's not on-screen violence that's the problem, as they meet vice president Biden for talks on America's gun culture.
After the flowers, condolences, and support from around the world, the police officers who dealt with the Connecticut school shooting have been given Christmas off, thanks to generous colleagues.