I am originally from the UK. I have a 10 year green card - It needs to be renewed March 2027. I have just received the news that my Father has Lung Cancer. I will be returning back to the UK this summer for a few weeks to be with him. Right now he seems in good spirit and is undergoing various tests to see how advanced the cancer , if it has spread and what the treatment plan will be (We find out next week). Once I have made my initial visit back to the UK I plan to apply to get my green card renewed. I have heard that there is a long wait time for this - I'm scared I will get the dreaded call to come home while my green card is in the process of renewal and that I have not received my new one. Is there a document that USCIS can issue for me to travel back and forth to the UK while my new green card application will be pending?