break (one's) silence
To voice one's opinion or comment on something after initially avoiding doing so. It took days, but the mayor has finally broken his silence on the scandal at city hall.
break silence
To address or publicize an issue that is not garnering attention. Our station broke silence on the mayor's scandal, and now even national news outlets are covering it!
break silence
to give information about a topic that no one was mentioning or discussing. The press finally broke silence on the question of the plagiarized editorial.