After a failed test in January, the next try-out of the missile-interception system has been postponed until late June.

ECONOMIST: Anti-missile defence

On its website, Amesys says its "strategic nationwide interception" system can detect email from Hotmail, Yahoo and Gmail and see chat conversations on MSN instant messaging and AIM.

WSJ: Foreign Firms Helped Gadhafi Spy on Libyans

It concluded that they were all more vulnerable to interception or pre-emptive strike than a submarine-launched system, and none was cheaper.

ECONOMIST: The decision to renew Trident was a foregone conclusion