UK raises terror threat level, West Africa Ebola outbreak worsens, and Iceland Closes Airspace After Volcano Erupts.

Today on Twitter UK raises terror threat level, citing Syria, Iraq risk 12 related Tweets CNN Breaking News, NBC Nightly News and more are tweeting about this. West Africa Ebola outbreak could infect 20,000 people 23 related Tweets Reuters Top News, NBC News and more are tweeting about this. Iceland Closes Airspace After Volcano Erupts 10 related Tweets Wall Street Journal, NBC News Pictures and more are tweeting about this. Trending in Photography More than 3591 related Tweets ExposureGuide, i need a guide and more are tweeting about this. Popular in Fashion More than 7021 related Tweets Hollister Co., Estée Lauder and more are tweeting about this. Top Tweets in Pets More than 7357 related Tweets Cute Emergency, Cat Porn™ and more are tweeting about this. Not what you're looking for? Find more Tweets by checking out Twitter's "Discover" timeline on mobile or web.   Explore Twitter   Email settings  | Opt-out | Help Twitter, Inc. 1355 Market Street, Suite 900 San Francisco, CA 94103