I have a Green Card (resident of New Jersey) but I am currently in the UK for work (on a work assignment from the US). I have been in the UK for about 2 weeks and will be here for another 2 weeks before returning to the US. I, however, just realized that my Green Card had expired about 6 months ago and never noticed it until now. My question are: (1). Will I have any difficulty re-entering the US in 2 weeks (I am a citizen of Japan and have my Japanese passport with me so I think I qualify for visa-free entry)? (2). Will I have any difficulty renewing my Green Card once I'm back in the US? Thank you in advance for your response.