Claiming 15,000 members, Earth First is now one of the most visible environmental groups in the country.

Nevertheless it was still one of the most visible leftist groups on campus in the mid-1950s.

You can cover all of these visible groups, and you're still not going to stop a McVeigh type.

Jihad Base in Iraq is the most powerful and visible group.

The two groups, barely visible to each other through the smoke and flames, battled the fire alone for what seemed like hours.

But a smaller and less visible group of about 250,000 pioneers moved in the opposite direction.

But they have remained a visible and resilient group that has preserved some traditions of the past.

Yet for years, New York and other cities have struggled to help a much larger, less visible group: families with no place to live.

The marching band is by far the most popular and visible group of them all.

Then he pointed to another group barely visible, and indicated they had no charge at all.