Homeland Security is working on rules to go into effect January 14, 2007 that would require anyone entering or leaving the country to have Homeland Security’s permission.
The U.S. Supreme Court has long recognized there is a constitutional right to travel internationally. Indeed, it has declared that the right to travel is "a virtually unconditional personal right." The United States has also signed treaties guaranteeing "freedom of travel." So if these regulations do go into effect, you can expect a lengthy court battle, both nationally and internationally. … Nazi Germany and the Soviet Union are two countries in recent history
that didn’t allow their citizens to travel abroad without permission.
If these regulations go into effect, you can add the United States to
this list. [Source]
On September 11, 2001, terrorists made an effort to change the United States. With unnecessary, controlling policies like what Homeland Security is proposing, we do nothing to increase security while removing our liberties (liberty being the ability to exercise our freedoms). The terrorists won. While considering this, take a look at the future of air travel.