Lebanon: as security challenges grow, top UN official in country urges end to political vacuum
At UN meteorological forum, experts meet to discuss post-2015 action plan, climate change
Concluding Ireland visit, UN chief tells refugee community world must provide 'safe avenues of migration'
Nepal: with monsoon season nearing, UN races humanitarian relief to quake-affected communities
On Africa Day, UN chief spotlights continents' achievements, reflects on challenges of 2015