1.   But supporters of the treaty say tests can adequately be done through supercomputer simulations.

2.   It is the combination of these laser experiments with supercomputer simulations that may allow the world to maintain reliable nuclear arsenals without the need for any actual weapons testing.

3.   Supercomputer simulations of the deep earth are raising success rates, cutting the need to bore extra wells.

4.   Supercomputer simulation became the preferred way to test nuclear weapons design after the signing of a Nuclear Test Ban Treaty.

5.   Supercomputer simulation became the preferred way to test nuclear weapons design after the Nuclear Test Ban Treaty was signed last year.