U.S. President Barack Obama urged NATO on Wednesday to help strengthen Ukraine's military and said the alliance must leave the door open to new members to counter what he called Russian aggression.
Obama was speaking in Estonia, one of three ex-Soviet Baltic states bordering Russia that fear separatist rebellion in eastern Ukraine could herald problems for them. All three have sizeable Russian minorities and rely on Russian fuel deliveries.
Obama, who will attend a NATO summit in Wales on Thursday, accused Russia of a 'brazen assault' on Ukraine, which for five months has been fighting pro-Russian separatists that Moscow describes as a defence force warding off Ukrainian aggressors.
