Autumn is a challenging moment for all horticultural pursuits.

Brodeur's most challenging moments in the period came around the six-minute mark.

We are positioned at a challenging moment in history and the demands of the 21st century are unprecedented.

He was faced with what constitutional experts said then was one of the most challenging moments in the history of independent India.

Later that season, he faced one of the most challenging moments of his track career.

Richard Cork called its original display in 1974 "one of the most challenging moments" of contemporary art.

His most challenging moment surely came this season with A. J.'s suicide attempt.

In times of sickness, your family may face some challenging moments.

No one disputes that this is a unique and challenging moment in our history.

I know California is going through a difficult time and this is a challenging moment for all of us.