US Says 'Overwhelming' Evidence Russia Behind Ukraine Unrest www.voanews.com/content/us-says- ... unrest/1889965.html
("A US State Department spokeswoman says the 'evidence is overwhelming' that recent pro-Russia uprisings in eastern Ukrainian cities were a 'very carefully orchestrated, well-planned, well-targeted' effort to take over buildings in several different cities in the same 24-hour period. Victoria Nuland, the top US diplomat for Europe, made the remarks when asked by a US lawmaker if the U.S. has any proof that Russia was involved in the unrest. Nuland testified Wednesday that events in Ukraine are 'a wake-up call'")
Note:
(a) Testimony; Victoria Nuland, Assistant Secretary, Bureau of European and Eurasian Affairs; Statement Before the Commission on Security and Cooperation in Europe (Helsinki Commission); Washington, DC; April 9, 2014 ("as prepared") www.state.gov/p/eur/rls/rm/2014/apr/224574.htm
Naturally, testimony does not include Q & A. And the quoted remarks came from Q & A.
(b) Commission on Security and Cooperation in Europe
en.wikipedia.org/wiki/Commission_on_Security_and_Cooperation_in_Europe
(also known as the US Helsinki Commission, is an independent US government agency created by Congress in 1976 to monitor and encourage compliance with the Helsinki Final Act [of 1975] and other Organization for Security and Co-operation in Europe (OSCE) commitments)