>> it seems clear to me also that climate change is a problem we can no longer be left to our future generations. >> thousands lined the streets of washington to greet the pope, including 5-year-old sophia cruz. pope francis called the little girl to him as she sat on her father's shoulders. she gave the pontiff a letter and a t-shurt. she was born in the united states but her parents are undocumented immigrants. she and her family traveled from los angeles to see the pope and sophia also came with a message for the pope. >> pope francis, i want to tell you that my heart is sad and i would like to ask you to speak with the president and the congress and legalizing my parents, because every day i am scared that one day they will take them away from me. i believe i have the right to live with my parents.