That's a familiar, grim lesson, but, sadly, Americans should not conclude that it has been taken to heart.
For the Italians, this was a grim lesson about the importance of well-coordinated air surveillance.
The grim lessons of two world wars have not gone completely unheeded.
Once again, they were left with nothing but two grim lessons.
How many of us would take such a grim lesson from such an exciting discovery?
But the attacks bear eerie similarities and grim lessons for counterterrorism officials.
Well, there's a grim lesson to be learned here about great expectations.
She broke into a wild laugh, knowing that grim lesson from her own spectacular life.
Public health officials and other experts agree that such grim lessons should no longer be necessary.
The efforts led to misery for many of the people uprooted, and the grim lessons were not lost on 150 Navajo families who refused to move.