Ukraine's Energy Challenge
OP-ED
Alan Riley: Sapping Europe’s energy security
Russia's Prime Minister Dmitry Medvedev (2nd L) meets local residents in the Crimean port of Sevastopol, on May 25, 2014, with Minister for Crimean Affairs Oleg Savelyev (L) attending the meeting. Medvedev visited yesterday Crimea to hand out passports during Ukraine's presidential vote, in a move denounced by Kiev as a \"deliberate provocation\". AFP PHOTO/ RIA-NOVOSTI/ POOL/ ALEXANDER ASTAFYE
LONDON — The European Union’s energy security is under threat — one of its largest suppliers of natural gas has gone rogue. If Vladimir V. Putin’s efforts to destabilize Ukraine had culminated in an invasion, up to 15 percent of Western Europe’s total supply would have been immediately cut off.