1.   They hoped to maintain radio silence.

2.   You will now maintain radio silence.

3.   Because of the radio silence, he said, he had to use a cellular telephone.

4.   A long agonizing radio silence ensued as the plane headed northeast, maintaining its course and altitude.

5.   But Lipson recently decided to break radio silence because he feels some of the potential bidders have a hidden agenda.

6.   He left the other two planes and flew for three hours in radio silence before the crash, investigators said.

7.   His disclosures about supposed radio silence are certainly compelling.

8.   Instead, debris from the shuttle rained down off the coast, and radio silence spelled out the worst scenario.

9.   On all of them, the GOP congressional leadership has either abjectly surrendered or maintained the political equivalent of strict radio silence.

10.   The planes flew low over the sea to avoid radar detection and in total radio silence.