US guns

Lawyers representing George Zimmerman, the man who shot unarmed Florida teenager Trayvon Martin, say they are dropping him – as a new announcement on the case is imminent.

Two men have been charged with murder after a shooting spree in a predominantly black district of Tulsa – which left three people dead and two others badly wounded.

Two thousand Pakistanis join a rally against drone attacks, labelled a “global assassination campaign” by thinker Noam Chomsky as security sources say the latest strike has killed 13 militants.

Authorities issue a lockdown at the campus of Virginia Tech after a person with a gun is reported on site. The school was the site of the 2007 mass shooting in which 32 people died.

The United States is to withhold some £500m in military assistance to Pakistan, as it “works through” strains in their relationship prompted by the raid that killed Osama bin Laden in May.

A Somali man is taken to the US to face charges of assisting terror groups in Yemen and Somalia, after being detained on a US Navy ship for more than two months.

As British soldiers parade past Parliament on the eve of a major US announcement on troop withdrawal, Channel 4 News asks them how they feel about the future of British involvement in Afghanistan.

A primary school teacher in Mexico has been praised after she kept her pupils calm by singing songs as a shootout took place outside.

His critics have branded him a “Joe McCarthy for the age of terror”. Republican Congressman Peter King is holding hearings into what he sees as the rising terror threat from American Muslims.

Seven alleged militants are killed in South Waziristan region of Pakistan in the first US drone attacks since the arrest of American Raymond Davis in January.

In his State of the Union address, President Obama tried to rediscover the political narrative of his presidency – that America can be great again, writes Channel 4 News sub-editor Felicity Spector.

President Obama pleads for the Arizona shootings not to be used for “politics and point-scoring”, but – as Felicity Spector reports – the political debate is already hotting up.

President Barack Obama leads a memorial to the victims of the Arizona shooting spree and urges Americans to debate “in a way that heals, not a way that wounds”, writes Sarah Smith.

As the man charged with the attempted murder of Gabrielle Giffords appears in court, Washington Correspondent Sarah Smith speaks to Arizona residents who vehemently defend their lax gun laws.

A 61-year-old woman who helped stop the Tucson gunman causing further deaths tells Channel 4 News she feels “humbled” after being praised by President Obama for wrestling ammunition from the killer.