The countries currently subject to a US travel ban are Iran, North Korea, Syria, Libya, Yemen, Somalia, and Venezuela. This list is subject to change so it's always best to check with official sources for the most up-to-date information.
cuba
No, the US has no jurisdiction on what other countries do.
http://travel.state.gov/travel/cis_pa_tw/tw/tw_1764.html go to that site. it has it all
About 180 ccountries have agreed to the ban. Us, Japan, India to name a few.
All countries in Europe
You can travel to as many countries as you like. All you need is a passport, and enough money and free time. Some countries ban there citizens from travelling to some other countries, for example citizens of Arab countries are banned from going to Israel, US citizens are banned from going to Cuba.
The right to travel with a US passport is one benefit of being a citizen of the US. US citizens need a passport to travel to other countries.
Some countries or US states have totally banned the use of flash drives (and other removable media) by governmental organizations.
No. The US did not, and never planned, to ban GTA V.
There was a controversy over ability to establish foreign players' age and eligibility.
No, passports are for traveling to other countries.
The states people cannot trade with foreign countries or travel to foreign countries.