Almost all weapons in the game exist in real life.

I think perhaps there exists some weapon which is aimed from above.

"The most important fact is that these weapons exist, Sittas."

No evidence that weapons of mass destruction ever existed has been found.

"MI6 aren't prepared to rule out the possibility that the weapon exists."

Every once in a while a crime comes along that couldn't have occurred even 50 years ago - simply because the weapon didn't exist.

If such weapons exist, we would do better to be friendly with their owners than hostile.

So long as nuclear weapons exist, there is a danger of them being used in error.

Of the respondents 59.1% said that they would feel safer if nuclear weapons no longer existed in the world.

The government will not allow Jones to leave the island until they are sure the weapons exist.