Contrary to the findings of the government, the "equivalent" building did not have nearly the same fireproofing as the US design, and the fire proved unstoppable.

And the Continental case showed that once a silent run begins, it can quickly prove unstoppable.

In the end, the tide of mainlanders may in fact prove unstoppable.

However, even a reduced-depth phalanx proved unstoppable to the lightly armed Persian infantry.

This attack achieved some local success, but the German onslaught proved unstoppable.

That strategy failed; Kidd averaged 22.2 points in the opening round and proved almost unstoppable in key moments.

"If we don't get to the bottom of this Kurl business soon, that might just prove unstoppable," said Cyl.

But the second one, well, she proved unstoppable in battle.

It was not long before everyone realized that the momentum created by these turn of events would prove unstoppable.

They came in such numbers that for a moment it seemed they would prove unstoppable.