Royal Navy also monitoring passage of Russian Navy ships in the English Channel ahead of major Nato exercise.
UK is leading Europe's biggest war game involving thousands of personnel and scores of warships.
Six observation towers to be erected amid reports of Russian military build-up.
IBTimes UK speaks to Lithuania's foreign minister Linas Linkevičius about Russia's expansionist policies.
Canada will expand its military mission against Islamic State (IS) by launching air strikes.
Russia warns Denmark against joining NATO's missile defense system or risking a naval nuclear attack.
Ukraine already has plenty of weapons, and adding to the stockpiles could be hugely dangerous.
March by 1,500 veterans and supporters of Latvian Waffen-SS troops countered by Jews and anti-fascists
Britain's Defence Secretary sought to dispel US concerns about cuts in his country's defences.
Far-left groups blame Nato for Ukraine crisis, while centre-left point finger at Kremlin aggression.
A paper from the Royal United Services Institute shows how budget cuts could affect armed forces.
The West needs to bolster its inadequate defence against the Putin threat.
One quarter of Estonia's population are ethnic Russians who want stronger ties with Moscow
Defence secretary warned Putin could deploy tactics to destabilise the Baltic states like in Crimea.
Putin's fall from power is more likely to come from a coup than anything Europe can impose.
BREAKING: 10 people have reportedly died at the Albacete airbase in central Spain.
Terror group say US-led mission a 'fire of barbarism and cruelty' that drowned country in 'pool of blood'.
Taliban spokesman: 'US and NATO mission was an absolute failure ...They are fleeing from Afghanistan.'
Moscow lists Nato alliance as top security threat in revised military doctrine.
Syria's President Assad says there have been no 'tangible results in two months of strikes' against Isis.
Russian warships also entered the English channel over the last week for "military exercises"
Jens Stoltenberg said a serious military build up taking place on Ukraine-Russia border.