Starting with nuclear power, they've backed one loser after another for the past half-century.

In truth, he could almost certainly have afforded to let her die any time during the past half-century.

But his unique name has really been everywhere for the past half-century.

And for the past half-century, hers has been the voice of America's most successful charity.

Paris is a great place to visit, but in the past half-century it has lost one-quarter of its population.

But this has been going on for much of the past half-century.

The mass media has grown as an institution over the past half-century.

The tract has been developed over the past half-century and is largely complete.

For the past half-century, it has hovered around 2 percent.

This is still the case, though there has been some cross-pollination during the past half-century.