Unavoidable offence is studied too, secretly. But governments are unwilling to attack openly. News reports in the US claimed that Barack Obama’s administration chose not to launch a cyber-attack against Libyan air defenses in March. “The US decision not to aim at Libya was largely political,” says James Lewis, a White House high official. Also, he adds, Obama did not want to be the first to openly launch a new form of war. October saw a great deal of talk about cyber-war. Also in October, the US Department of Defense announced that the country’s highest military officers were reviewing the rules of engagement for cyber-war. A few days later, another report suggested a certain country may have launched a cyber-attack against two US civilian satellites.
Caution and a focus on defense make sense. Computer technology spreads fast. It does not pay to attack if your weapons can be turned against you. The computer virus Duqu Trojan is troublesome, but more extensive Stuxnet cyber-attack could lead to a real cyber-war.
50.The cyber-attack on Iran’s plant mentioned in paragraph one shows us
A.it is wrong to invade a country B.cyber-attack isn’t far from us
C.a uranium enrichment plant is illegal D.Israel or the US is dangerous
51.Cyber threats
A.can hardly reach America B.aren’t paid much attention to
C.raise great alarm to America D.are limited to stealing information
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