Many students also wanted to protest against the result of the inquest into Mark Duggan's death – a verdict of "lawful killing" was reached after a policeman shot and killed Duggan in August last year.
Her PhD examined the social and legal perceptions of children who kill, from the 18th century to the present, and included reaction to the killing in 1993 of the Liverpool toddler James Bulger by two 10-year-olds.
But the greater significance of that day in Dallas – beyond the arguments about the grassy knoll and the Zapruder film – is the effect the killing had on how the Kennedy presidency would be viewed thereafter.
On top of his wife battling cancer, Gerry Adams now faces serious accusations from a former comrade over the McConville killing as well as claims that he played a major role in Bloody Friday, a series of bomb blasts across Belfast in July 1972 that left nine dead and dozens injured.
Farc has been increasing its activities, including the killing of two unarmed members of the Nasa indigenous community and last week the capture of two soldiers after combat.
Despite the traumatic way she learned of her son's death, Irwin said her faith in the Department of Criminal Investigations, the body looking into the killing, was steadfast.
Speaking in Cairo, he said: "As I move to Syria, we will do whatever we can to urge and press for a cessation of hostilities and end to the killing and violence.
In the eight months since the killing of unarmed teenager Michael Brown brought increased focus on police violence, more and more officer-involved shootings that also involve mental illness have come to light.
Which is not saying that killing time is wrong, if that's what you want.
Bin Laden also wrote that he found the suggestion of one militant in Yemen that blades be attached to a tractor or other farm machine to create a "killing machine" in the US unacceptablee".
When I visited the Jordanian border with Syria I met young children who witnessed the killing of their relatives, who had walked for weeks to escape the violence, and who face all the uncertainties and difficulties of life as a refugee.
