Hana v. Gonzalez, 400 F.3d 472 (6th Cir. March 14, 2005) (looking at totality of the circumstances, Iraqi woman did not abandon her LPR status, despite 4 years of living abroad, where the reason for her absence from the United States was because she feared her absence would alert the Government to her attempt to immigrate herself and her family to the United States, and because she needed to care for her ailing mother).