According to Fiona Qian, the firm's deputy manager, the high cost of doing this means some refineries are still dumping toxic waste in landfills.

"We have greater control over the orbiter than we used to," says Clinton Dorris, deputy manager of the Altair lander program.

They usually are the general managers of small- or medium- sized companies or deputy manager of big ones. They are in charge of tens or even hundreds of millions worth of business every year.