Green card holders can travel abroad for a maximum period of 180 days on each trip. If you need to stay outside longer for employment or religious purposes you should apply for reentry permit using the Form I-131 travel document which is valid for 2 years. Also you can use the Form N-470 meanwhile to preserve residence for naturalization process. If without a reentry permit you have stayed outside US for 3 years in that case a return visa SB-1 may help you to reenter US provided your explanation is accepted by USCIS.
you can leave the country but no more than 6 months
If you have been here legally for three years, you can get married. However, you can not apply for your green card until you have lived In the country for five years.
20 years
230 years
There hasn't even been announced in any country in the world yet, but it is still possible in the next 50 years.
58 years
over 2000 years
Green Day, the band, have been active since 1987, and are currently still active.
Afghanistan has been a country for over 200 years, since it gained independence from the British Empire in 1919.
Africa is -not- a country, it is a continent.
i think is SOMALIA, the country were they still been a war.
Unemployment has been a big issue in this country for many years. There have been a lot of new jobs that have been created but their are still many people that have not gone back to work yet.