London 2012 Olympic hopeful Peter Wilson smashed a world record on his way to victory in the ISSF Shotgun World Cup in Tucson, Arizona.

The Yorkshire-born minimalist architect John Pawson has designed the clean lines of commercial buildings, airport lounges and even monasteries all around the world.

Presidents have praised the magnificence of this geological scar in the south-west US, yet most people only see it in summer. To enjoy this landmark in solitude – go with the snow, says Chris Leadbeater

Arizona's growing Hispanic population has borne the brunt of Republicans' bitter rhetoric against immigrants. Now they plan to turn the state Democrat

Blemished by a botched rally in a near-empty Detroit stadium and an unfortunate boast about his collection of cars, Mitt Romney was last night stumbling towards primary contests in two key American states on Tuesday that could determine the future of his quest for the Republican nomination.

Jeb Bush, seen by some as a Republican candidate-in-waiting for the 2016 presidential season, has set aside normal party decorum by lamenting this year's contenders, likening them to a "circular firing squad" scaring away independent voters with right-wing rhetoric that plays on their fears.

A vaccine against norovirus, a food poisoning virus that causes violent stomach flu, could be available within five years if it can be shown to be safe when taken as a nasal spray, scientists said.

The Grand Canyon State celebrates its centenary this week, but the cinematic drama of its iconic landscapes has a timeless appeal for travellers.

Paul Lawrie is back in the world top 50 for the first time since 2003, after he won his second Qatar Masters title yesterday. The 43-year-old Scot (above) chipped in twice in a brilliant closing 65 to beat the Australian Jason Day and Swede Peter Hanson by four.

Drive past grand dams and the Grand Canyon – in the tyre tracks of a king of colour photography.

Gabrielle Giffords, the Arizona Congresswoman who has emerged as a symbol of courage and endurance in the 12 months since she was shot in the head while meeting her constituents outside a supermarket in Tucson, surprised her supporters yesterday by announcing that she is giving up her seat.

Authorities have determined that a dismembered head and other body parts found in a rugged hillside park near the famed "Hollywood" sign are the remains of a man who lived in an a nearby apartment.

Knowledge may be pure, but its application can be misused for for the detriment of humanity

He likes to call himself "America's toughest sheriff" – but a report by the US government suggests that, against stiff opposition, he is probably its most racist sheriff, too.