We also continue to believe that unilateral action by either side does not help the cause of reaching a peace agreement.

WHITEHOUSE: Press Briefing

So that is why we are critical of unilateral steps by either side that we believe do not serve the cause of returning to face-to-face negotiations, and it is why we encourage both sides to return to face-to-face negotiations.

WHITEHOUSE: Press Briefing

WTO's complaints procedure, however cumbersome, has at least prevented each side from resorting to unilateral actions.

ECONOMIST: Trade disputes

There is no mutual cease-fire agreement between the Israelis and Palestinians -- each side has made its own unilateral declaration of a cease-fire.

CNN: Israel says it plans swift Gaza withdrawal

We believe that when it comes to Middle East peace between the Israelis and Palestinians, it is essential for direct face-to-fact negotiations to resume, and it is essential for each side to refrain from taking unilateral actions that make it more difficult to engage in face-to-face negotiations, and to allow that process to proceed to a point where a sustainable peace is possible.

WHITEHOUSE: Press Briefing by Press Secretary Jay Carney,

The problem is the total mistrust that exists, the disbelief of almost anything that the other side says and the unwillingness and right now political inability to take unilateral gestures, there has to be an understanding that there's, anything's going to happen the other side will reciprocate.

BBC: News Online