RUSSIA-JAPAN-QUAKE-NUCLEAR-ENERGY-RUSSIA-SECURITY

Cars drive by a checkpoint at the Kalinin Nuclear Power Plant, in Udomlya, some 330 km, outside Moscow, on March 18, 2011. Anxious Russian nuclear engineers swung open the doors on March 18, 2011 to the atomic power plant nearest Moscow to prove that its four reactors would never suffer the type of event witnessed in Japan. The Kalinin nuclear power plant sits just 330 kilometres (200 miles) northwest of Moscow -- a sprawling white cement structure whose four water cooling towers shoot up almost directly upwind from the Russian capital. AFP PHOTO / ANDREY SMIRNOV (Photo by ANDREY SMIRNOV / AFP) (Photo by ANDREY SMIRNOV/AFP via Getty Images)