Obama signing nuclear treaty with Russia in Prague

Obama waves upon his arrival at Prague airport Photograph: Srdjan Suki/EPA Photograph: Srdjan Suki/guardian.co.uk Obama with Jan Kohout, the Czech minister of foreign affairs Photograph: Srdjan Suki/EPA Photograph: Srdjan Suki/guardian.co.uk Obama disembarks under guard of honour at Prague airport Photograph: Srdjan Suki/EPA Photograph: Srdjan Suki/guardian.co.uk Obama disembarks under guard of honour at Prague airport Photograph: David W Cerny/Reuters Photograph: David W Cerny/guardian.co.uk Obama meets the Russian president, Dmitry Medvedev (left), and the Czech president, Vaclav Klaus, for the signing of the new Strategic Arms Reduction Treaty (Start) Photograph: JASON REED/REUTERS Photograph: JASON REED/guardian.co.uk