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WASHINGTON (CBS) -- Hackers have made some much publicized attacks on American businesses in recent weeks hitting companies such as Apple, Facebook and the New York Times and a private cybersecurity firm has linked many of those attacks to China. The White House will announce new plans this afternoon to protect America's government and corporations.

The Obama administration will announce new plans this afternoon to strike back at countries that support hackers who steal American trade secrets. White House press secretary Jay Carney says, "The United States has substantial and growing concerns about the threats to U.S. economic and national security posed by cyber intrusions, including the theft of commercial information."

The government will likely announce fines, penalties and trade sanctions against any government sponsored hackers. The president alluded to such action during his State of the Union address. President Obama says, "We cannot look back years from now and wonder why we did nothing in the face of real threats to our security and our economy."

Mandiant, a U.S. based cybersecurity firm, released a report Tuesday saying it traced at least 141 cyber attacks to a 12-story building on the outskirts of Shanghai. It is the base for a Chinese army unit.

Chinese officials deny the allegations, and say they have been the victims of U.S. hackers.

Officials at the Pentagon and Department of Homeland Security announced they will hire an additional 4,600 people to beef up their cyber forces.

At the U.S. Cyber Command, the government follows hackers trying to break into critical U.S. systems like the National Power Grid, air traffic control systems, and financial institutions. Mandiant co-founder Kevin Mandia says, "These attackers have full control of the systems that they're breaking into."

Experts say it's only a matter of time before hackers destroy one of these systems.

The U.S. Cyber Command estimates American companies are losing $250 billion a year in intellectual properties.

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