Finland and Sweden plan to work more closely with Nato by signing a pact that allows assistance from alliance troops in the Nordic countries in emergency situations, officials said on Wednesday. The move comes as Nato prepares for a summit next week in Wales amid heightened tensions with Russia over the crisis in Ukraine. Finland shares a 1,300km (800-mile) border with Russia. The Finnish government said the host nation support agreement applies to situations which include "disasters, disruptions and threats to security". It also enables joint training exercises and military cooperation. Finnish defence ministry senior adviser Mika Varvikko said Finland...