With uranium, it's much easier to put in safeguards to monitor the atmosphere and instruments.

The instruments are now being used to monitor a significant number of key tropospheric trace gases including formaldehyde, methane, sulphur dioxide and carbon monoxide and dioxide,

Costa Rica is a marvelous place to enter the atmosphere.

There's a dual use behind this test. The other possible use is to improve on the computer simulations that they use for new weapons designs.

I think our safeguards are in place and are working,

Since the Martian atmosphere is different in some ways, we can take theories that have been developed in the terrestrial case and test whether they work on Mars as well or whether there are areas that need improving.