Flames rise after a gas pipeline blast in Moscow May 10, 2009. Moscow suffered its worst fire in decades when a gas pipeline blast sent flames bursting into the sky and raised new concerns about the security of Russia's ageing energy infrastructure. Reuters Pictures 6 months ago

Flames rise after a gas pipeline blast in Moscow May 10, 2009. Moscow suffered its worst fire in decades when a gas pipeline blast sent flames bursting into the sky and raised new concerns about the security of Russia's ageing energy infrastructure.