Concrete reinforced structures buried under the earth were a tough target.

He added, "It's a really tough target to reach in mass media, that international traveler."

A tighter bill would have been a tougher target for critics to hit.

When Shuler ran in 2006, he was a tough target for opponents.

He knows, and that means he's going to be a very tough target.

He said "these tough targets will produce a list of options for us to consider."

These opponents sometimes become tougher targets because of the hostages they keep so near to them.

We knew we had a tough target to go for.

Some countries have been set a very tough target; others, on the other hand, a ridiculously easy one.

This, in my view, is a tough target, but it should be possible to achieve it.