be at a dead end in a sentence

1. But warnings that the peace talks may be at a dead end are now also being sounded by political figures and commentators normally sympathetic to the prime minister.
2. Albright made no statement as she left a downtown hotel where she had met with the prime minister against a backdrop U . S . concern that peacemaking with the Palestinians may be at a dead end.
3. It's difficult to find be at a dead end in a sentence.