Answer:
All of the statements apply.
Explanation:
After the events of Septermber 11, commonly referred to as 9/11, security radically changed for Americans.
A new law was emitted: the Patriot Act, which created a new government agency: the American Homeland Security Deparment, in task of protecting the country against terrorism.
The Patriot Act also enacted measures like the ones described in the question, with the goal of increasing protection against a foreign terrorist threat. However, these measures have also been criticized because they are seen by some commentators as being against civil liberties.
Security in airports also became a lot tighter because the 9/11 attacks were specifically perpetrated by foreign terrorist who hijacked four planes.
