For many, the scale and impact of government actions on Palestinian communities under the recent Netanyahu coalition were galvanizing forces, voters and advocates said.
The suspect, 41, who had been "entrusted with sensitive information," was arrested on suspicion of espionage, according to U.S. and British authorities.
The talks are expected to include a broad discussion of European security, a move observers described as a risky nod to a key Russian goal of having a greater say in Europe's security.
At least a dozen U.S. refueling planes and other aircraft departed on Monday from a British base that is a major hub for the U.S. Air Force. The reasons behind the move remain unclear.