` ` We must defend our NATO allies , '' President Barack Obama says . Peaceful regions ` ` threatened by Russia 's aggression against Ukraine , '' Obama says . The Islamists ' actions in Iraq and Syria also call for concern for NATO members . Summit originally scheduled to discuss NATO 's future when troops leave .
`` We will defend our NATO allies , '' President Barack Obama says . Peaceful Europe `` threatened by Russia 's aggression against Ukraine , '' Obama says . Militant Islamists ' gains in Iraq and Syria also cause for concern for NATO members . Summit originally scheduled to address Afghanistan 's future when troops leave .