Japanese companies (such as Mitsubishi Heavy) are working on a so-called clamshell nose cone that is supposed to increase reliability by opening like a clamshell outside the atmosphere and reducing the number of maneuvers required to hit an incoming missile.

FORBES: Magazine Article

Japanese companies (such as Mitsubishi Heavy) are working on a so-called clamshell nose cone that is supposed to increase reliability by opening outside the atmosphere and reducing the number of maneuvers required to hit an incoming missile.

FORBES: Magazine Article

According to a recent report by the United Nations Environment Programme, reducing black carbon and ozone in the lower part of the atmosphere, especially in the Arctic countries of America, Canada, Russia and Scandinavia, could cut warming in the Arctic by two-thirds over the next three decades.

ECONOMIST: Climate change in the Arctic