Russian soldiers sit atop their tank during military exercises in the southern Russia's Volgograd region, on April 3, 2014.
Russian soldiers sit atop their tank during military exercises in the southern Russia's Volgograd region, on April 3, 2014.

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    Estonia calls for 'physical' deterrence

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Estonia calls for 'physical' deterrence

Estonian President Toomas Hendrik Ilves calls for a physical presence on the ground in the region to deter Russia's Putin.

Estonia calls for 'physical' deterrence

Estonian President Toomas Hendrik Ilves calls for a physical presence on the ground in the region to deter Russia's Putin.