In truth, the challenges presented by nearly all demonstrations and other public events are logistical ones, not law enforcement ones.

The challenge the sprout presents the cook has long made it the darling of the winter kitchen.

But a challenge to create a new arts school presents itself maybe once in a lifetime.

Even a challenge presented by an insignificant seventeen-year-old girl.

Eventually he would refocus his energies on whatever challenge or obstacle presented itself.

Starting a law firm presents many challenges, especially for associates who have not had much experience running a firm.

But such a challenge has also presented me with a unique opportunity.

When new or unexpected challenges presented themselves, solutions were found using current military systems.

A pragmatic approach is needed to these problems when new challenges present themselves.

If new challenges should present themselves, we shall not be able to close our eyes to them.