24 hours in pictures : October 31 2007

Philadelphia, US: Hillary Clinton greets supporters following the NBC Democratic presidential candidates' debate Photograph: Stan Honda/AFP

Madrid, Spain: Some of the 28 suspects accused of the 2004 Madrid train bombings sit inside an annex of the high court Photograph: Emilio Naranjo/AFP

New York, US: Oil and natural gas traders on the floor of the Mercantile Exchange Photograph: Mark Lennihan/AP

London, England: King Abdullah of Saudi Arabia's entourage walks into No 10 Downing Street Photograph: Leon Neal/AFP

Istanbul, Turkey: A woman passes in front of some anti-war graffiti Photograph: Dimitar Dilkoff/AFP

Gloucestershire, US: Autumn colours at the national arboretum Photograph: Anthony Devlin/PA

Adjame, Abidjan: A collection of lost residency permits is displayed on a street market Photograph: Kambou Sia/AFP

Las Vegas, US: The silver paintwork on a custom car reflects visitors at the world's largest car specialty products trade fair Photograph: Gabriel Buoys/AFP

New York, US: A man dressed as a portable toilet walks down a Manhattan street as part of an ad campaign for a portable bathroom and toilet company Photograph: Emmanuel Dunand/AFP

Jericho, West Bank: Young Palestinian cadets participate in a morning drill Photograph: Muhammed Muheisen/AP

Manila, Philippines: Chickens feed on graves at a public cemetery that has become a shanty town in the Navotas area of the city Photograph: Dennis M Sabangan/EPA

Kabul, Afghanistan: A woman carries a sack on her head as she walks down a street Photograph: Rafiq Maqbool/AP