What measures did the United States take after the 9 1 1 incident?

After the "9. 1 1" incident, the US government successively issued a series of anti-terrorism documents and measures to declare war on global terrorism.

On September 9, 2000 19, President Bush signed the Patriot Act, which, in the name of safeguarding national security, gave the relevant authorities more investigation and search powers, and strengthened the tracking and control of immigrants and international students.

In April 2002, the U.S. Department of Defense established a new "Northern Command" to be responsible for the defense of the United States. 165438+ 10 In October, President Bush signed a bill to establish the Department of Homeland Security, and declared that this bill would enable the United States to respond to terrorist attacks more coordinately and effectively.

In September 2002, the United States announced the first national security strategy of the United States since President Bush took office, and formally put forward the "preemptive" strategy of launching active attacks on terrorists and hostile countries for the first time.

In February 2003, the Bush administration announced the national strategy to combat terrorism, which indicated that the United States would lead the fight against terrorists and act alone when necessary.

Extended Information 200 1 US Eastern Time September 1 1 On the morning, two civil airliners hijacked by terrorists crashed into World Trade Center 1 Building and World Trade Center Building 2 respectively, and the two buildings collapsed after being attacked.

The other five buildings of the World Trade Center in the United States also collapsed and were damaged in the earthquake. At 9 o'clock in the morning of September, 20065438 1 1, another hijacked passenger plane crashed into the Pentagon of the US Department of Defense in Washington, USA, and the Pentagon was partially damaged and collapsed.

Baidu Encyclopedia -9 1 1 Event

China Net-The main anti-terrorism documents and measures issued by the United States after the "9. 1 1" incident.