BRUSSELS, Nov. 19 (UPI) -- The European Union's Lisbon Treaty may streamline EU operations but likely won't produce the long-sought single voice for Europe, a senior U.S. official says.

WASHINGTON, Nov. 6 (UPI) -- The United States and the European Union launched a high-level council meant to address clean technology and energy security.

WASHINGTON, Oct. 29 (UPI) -- The U.S. and Ukrainian governments announced the creation of a bilateral energy security working group to strengthen energy security for Ukraine and Europe.

BUCHAREST, Romania, Sept. 24 (UPI) -- Romania is using the 64th session of the U.N. General Assembly in New York to advance its energy agenda.

BAKU, Azerbaijan, Aug. 28 (UPI) -- The United States sees Azerbaijan as a key partner in the effort to enhance energy security for its European allies, a special envoy to the region said.

WASHINGTON, July 2 (UPI) -- Azerbaijan is an important partner to the United States in terms of energy security and diversification, said the U.S. special envoy for Eurasian energy.

WASHINGTON, June 26 (UPI) -- Turkmenistan's Foreign Minister Rashid Meredov wrapped up his visit to Washington, meeting with energy officials and raising hopes for the Nabucco pipeline.

BAKU, Azerbaijan, June 25 (UPI) -- There are no plans to include Iran in the planned Nabucco natural gas pipeline to Europe, said the U.S. special envoy for Eurasian energy issues.

ANKARA, Turkey, June 8 (UPI) -- Washington opposes Iranian involvement in the Nabucco gas pipeline to Europe based on the provisions of economic sanctions on Tehran, officials say.