Men queue at the reception of a military enlistment office in Kiev, on March 2, 2014. Ukraine is to call up all military reservists, the head of the national security and defence council said Sunday, after Russia's parliament approved the deployment of troops in the country. Ukraine warned Sunday it was on the brink of disaster after Russia's threat to invade its neighbour drew sharp rebukes from the United States and NATO. AFP PHOTO/ YURY KIRNICHNY

A man waits at the reception of a military enlistment office in Kiev, on March 2, 2014. Ukraine is to call up all military reservists, the head of the national security and defence council said Sunday, after Russia's parliament approved the deployment of troops in the country. Ukraine warned Sunday it was on the brink of disaster after Russia's threat to invade its neighbour drew sharp rebukes from the United States and NATO. AFP PHOTO/ YURY KIRNICHNY

Men queue at the reception of a military enlistment office in Kiev, on March 2, 2014. Ukraine is to call up all military reservists, the head of the national security and defence council said Sunday, after Russia's parliament approved the deployment of troops in the country. Ukraine warned Sunday it was on the brink of disaster after Russia's threat to invade its neighbour drew sharp rebukes from the United States and NATO. AFP PHOTO/ YURY KIRNICHNY

A man waits at the reception of a military enlistment office in Kiev, on March 2, 2014. Ukraine is to call up all military reservists, the head of the national security and defence council said Sunday, after Russia's parliament approved the deployment of troops in the country. Ukraine warned Sunday it was on the brink of disaster after Russia's threat to invade its neighbour drew sharp rebukes from the United States and NATO. AFP PHOTO/ YURY KIRNICHNY

A man waits at the reception of a military enlistment office in Kiev, on March 2, 2014. Ukraine is to call up all military reservists, the head of the national security and defence council said Sunday, after Russia's parliament approved the deployment of troops in the country. Ukraine warned Sunday it was on the brink of disaster after Russia's threat to invade its neighbour drew sharp rebukes from the United States and NATO. AFP PHOTO/ YURY KIRNICHNY

An Ukrainian reservist displays his military ID which he received after visiting one of Kiev's military enlistment offices, on March 2, 2014. Ukraine is to call up all military reservists, the head of the national security and defence council said Sunday, after Russia's parliament approved the deployment of troops in the country. Ukraine warned Sunday it was on the brink of disaster after Russia's threat to invade its neighbour drew sharp rebukes from the United States and NATO. AFP PHOTO/ YURY KIRNICHNY