Still, he is definitely retiring, and that threatens to leave both companies without their visionary leader at a time of crucial challenges.

A crucial challenge in producing 1,210 hours of coverage is finding announcers to call all the sports.

Another crucial challenge was the economy, which was dependent on British military bases that would soon be closed.

A crucial challenge will be holding them to their word.

The creation of a self-sustaining economy is another crucial challenge.

But the crucial challenge will remain finding customers willing to spend.

For them, the crucial challenge is to come up with policies more in tune with voters.

The crucial challenge for Fox becomes avoiding overdosing on a show that is the best medicine in television.

These are all crucial challenges we must take up to make our European towns attractive, competitive and pleasant places to live.

Spatial justice is a crucial challenge because it is the ultimate goal of many planning policies.