A memorial to journalists Alison Parker and Adam Ward outside the offices of  WDBJ7 in Roanoke, Virginia.  Photograph: Chris Keane

It’s 56 seconds long, a video of two murders being executed with the intention of having the maximum public exposure. The killing of two journalists (...)

WDBJ weatherman Leo (centre) at the makeshift memorial with members of the crew at the studios in Roanoke, Virginia. Photograph: Paul J Richards/AFP/Getty Images

Colleagues of the two American journalists killed live on air on Wednesday held a moment’s silence to remember their co-workers a day after the kil(...)

The car of suspected gunman Vester L. Flanagan, also known as Bryce Williams, is seen off Highway I-66 in Fauquier County, Virginia on Wednesday. Photograph: Reuters

Alison Parker, morning reporter WDBJ7 Alison Parker was a rising star at the Virginia station where she first began her career as an intern. The WDBJ(...)

Vester Lee Flanagan, who was known on-air as Bryce Williams, is shown in this handout photo from TV station WDBJ7. Photograph: Reuters/WDBJ7

A man who shot dead a TV reporter and cameraman during a live news broadcast in the US told authorities afterwards he was a “human powder keg...just w(...)

The Roses walk in Tralee Town Park at the opening of the Rose Walk dedicated to 2011 Washington DC Rose Dorothy Henggeler, who died last year. Photogaph: Domnick Walsh/Eye Focus

In April last year the 2011 Washington DC Rose, Dorothy Moriarty Henggeler, died of a brain haemorrhage shortly before her 28th birthday. Her parents(...)

A photo with victims of the shooting at Sandy Hook Elementary School in late 2012. Photograph: Win McNamee/Getty Images

My children played a new game at school the other day. It was called Code Red. It was a game, but it wasn’t supposed to be fun. “The teacher pu(...)

A prototype of a Google driverless car. Google Inc is building cars that don’t have steering wheels, accelerator pedals or brake pedals. photograph: reuters/google inc/handout via reuters

Human error is the culprit in 93 per cent of vehicle crashes – including the pile-up last weekend that left comedian Tracy Morgan in critical conditio(...)

When, in April 2007, American newsrooms first learned of a mass shooting at the Virginia Tech campus, journalists seeking information on the victim(...)