Use "dismaying" in a sentence

1. The rapid consensus amongst congress, the joint chiefs, was dismaying

2. “I understand, but it was rather dismaying at first

3. There was no point in dismaying them further by revealing the full facts of the military and bureaucratic inefficiency which allowed the German warships to sail unscathed past the cliffs of Dover

4. Though this was not uncharacteristic of his friend, he found it quite odd and dismaying that such an intelligent man would be doing something so very reckless and irresponsible

5. A dismaying thought had taken root in my mind

6. Is this dismaying fact ever put into textbooks? Never