The "Cyber ShockWave" digital mass cyber attack simulation on the U.S. infrastructure took place earlier in the week, as the government evaluates its preparation strategy. 

The test took place under the supervision of former top U.S. officials who were on hand to respond to a mock cyber attack.  Michael Chertoff, former president George W. Bush Homeland Security chief, held the mock role of National Security Advisor.  He spearheaded the actions by the mock cabinet, and several scenarios could have been implemented.

The officials considered retaliatory plans of a counter attack, calling in the National Guard or nationalizing the country's critical infrastructure, such as utility companies.  Officials ranging from Secretary of Defense to deputy commander of U.S. European Command and the Secretary of State would be involved if a major cyber attack hit the U.S.

CNN filmed the exercise that was officially requested by the Bipartisan Policy Center, and plans to host a special to reveal the footage. 

Even though those who took part believe current standards would help; cyber security experts are unsure how prepared the U.S. government would be.

Cyber attacks against the government and public utilities remain a major threat to the United States, cyber experts point out.  Both the Chinese and Russian governments already have technology capable of large-scale cyber attacks, but there is a higher government concern of possible Al-Qaeda cyber attacks.

In addition to potential terrorists, there also is a major threat among hacker mercenaries willing to launch cyber attacks for money.  

The lackluster response to previous attacks -- and a growing threat from several different sources -- has led cyber security to be a pressing matter for President Obama's administration.