Hi , I got the DV lottery visa 2 months before and the last date of arrive is 10th 0f October 2014 according to my visa in passport. But i bought the ticket of 7th october 2014 and will arrive US on 8th October 2014(2 days before last date of arrival) due to some reasons. So i would like to know.. does it affect to my visa and about getting Social security number after arriving visa.. I heard we have to be in US atleast 15 days before expiration of arrival otherwise we wont get SSN and greencard. Please help me out with this problem..