Every country has the right to control who is allowed to enter their country and who isn't. A visa is basically permission from the country's government to enter.
A multiple entry visa means that you can enter and exit the country (issuing the visa) as many times as you want, within the visa validity period. On the other hand, in case you were issued a single entry visa, you can only enter and exit the country (issuing the visa) once. Once you have exited that country, you can not re-enter on that same visa regardless of whether the visa is valid or expired.
Yes you need passport with visa to enter any other country.
You apply for a visa to enter a country, from the Embassy or Consulate of the country you wish to enter. Do not just turn up at the border and expecto be able to enter, without a visa. You will be refused entry. NB A passport is just an Identity Document, that allows you to leave your home nation. To enter a foreign country you must obtain a visa. NNB Some countries have amicable diplomatic relations and so allow people to enter without a visa. Other countries do not have this diplomatic courtesy, so you must check with their embassy/consulate. NNNB there are different classes of visa. Tourist Visa, Work Visa, Residence Visa, Diplomatic Visa. My advice ; Whatever, country your passport issued in, check with the embassy/consulate of the country you wish to enter, before travelling.
No, Mongolians will not need a Visa to enter Canada. They can stay in the country for up to 30 days.
Syrians don't need a visa to enter Malaysia.
The visa is not necessary for Australians citizens.
Are you asking about a visa to enter the country, or a visa to enter to enter another country from the US? Either way, it's a federal offense to lie on an official government document. NOT a good thing to have happen!
Yes.
No - you still need a visa to enter the UK !
Yes. In general, you'll need a visa to enter any other country, including Brazil.
You need a passport and an entry visa if you are entering Mexico from any country other then the US.
No visas are required for Americans to enter any EU country.