In a long relationship, there had been many difficult moments.

"I think there are going to be some difficult moments."

It was perhaps my most difficult moment as a Congressman.

At very difficult moments in my life, I've met people who took the time to help me.

This is a difficult moment for you, to face the reality about yourself.

"He just decided to do it at a difficult moment."

All this came at a difficult moment for the American political system.

This is a very difficult moment, especially during a crisis.

The most difficult moment had come when he brought up the forged C222 order form.

A sense of purpose developed over months had pushed the Americans through their most difficult moment yet.