Students from around the UK have gathered in London to call for an effective arms trade treaty.
Around 100 people staged a protest in which they pretended to die, to illustrate the 1,500 deaths which Amnesty International claims are caused by weapons each day.
They urged the Government to lead the call for an effective arms trade treaty at a United Nations (UN) conference in New York on March 18.
David Grimason, whose two-year-old son Alistair was shot dead by a gunman who was carrying an illegal weapon at a Turkish cafe in 2003, attended the demonstration at Amnesty International's UK headquarters in London.
He said: "The treaty will try to regulate the flow of arms - the import and export between nations - to stop weapons getting into the hands of people like the man who killed my son."