What is the name of your state? NY
My sister-in-law's family just received green cards and will be coming to the US in a week or so. Her older son, however, will have to go back a week later to finish up his last school semester before coming back here for good. They are worried if he is allowed to leave the US so soon after arriving here, especially since his green card will not come by mail yet. When it does, someone will bring it to him (they have lots of family members travelling back and forth) so he'll have it with him when he comes back in a few weeks.
My sister-in-law's family just received green cards and will be coming to the US in a week or so. Her older son, however, will have to go back a week later to finish up his last school semester before coming back here for good. They are worried if he is allowed to leave the US so soon after arriving here, especially since his green card will not come by mail yet. When it does, someone will bring it to him (they have lots of family members travelling back and forth) so he'll have it with him when he comes back in a few weeks.