DO I NEED TO BE WORKING TO INVITE SOMEBODY TO VISTE ME TO USA, FROM NIGERIA , I AM ON DISIABLITY

Not necessarily. You could tell the U.S. Embassy that your friend could stay with you and your family while he/she is in the U.S. Please see

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Can a solider request a visa for spouse during deployment?

Your husband can sponsor you for a green card during his deployment.

I have some question about re-entry permit

Since Guam is part of the U.S., if you return to Guam before your Re-Entry Permit expires, you will be okay. Please see

Is it advisable to start the green card process with MS + 0 years of experience with my current employer or should I change my

You did not mention what your occupation is. However, in general, it might be better for you to get a job which requires both an M.S. degree and...

Can a Greencard holder apply for an emergency necessity based stay to go to the middle east?

He needs to apply for a Re-Entry Permit. Please see

Sibling Petition

She can sponsor you by submitting form I-130 to the USCIS. The process takes 11 years. Please see

Im immigrating my husband we have been togethor since April 19, 2007 but we are legally married since April 2, 2009.

He will have to present a fully documented I-601 waiver application in CDJ demonstrating that you would suffer "extreme hardship" if he were barred...

If employement based AOS I-485 get denied, can you apply for withholding of removal?

Once the I-485 is denied, you will probably be placed under removal proceedings. You can apply for withholding of removal if you are...

I-140 approved on July 2008, priority date is current, Job offer still exists, do I need to apply for a new I-140?

No new I-140 is needed. Please see

Do you need a laywer for employement based I-485 application?

You can try to do anything without an lawyer if you wish. You can also performed surgery on yourself without a physician, but you would be foolish...