Unlike the United States, there are a variety of countries that cannot practice freedom of speech, including Burma, North Korea, Turkmenistan and Libya. Other countries that abide by a strict censorship include Cuba, Syria, Eritrea and Uzbekistan.
A strict censorship basically isolates the citizens of these countries because the government prevents the media from providing any information on the rest of the world. Typically, these governments will impose violence on any journalists who come in to report news or to seek information on the well being of citizens living in these countries. There are also laws in place that restrict the use of the Internet and prevent citizens from speaking out negatively against the government.