Thank you so much! I'll just solder the part back on, in that case.

Hi! When I was wiggling the header out of my pi when I heard something clatter on my desk...and realized it came from the pi. I've shown the part that came off in the image included: what does this do? Is the pi broken? Can I re-attach it? https://photos-2.dropbox.com/t/2/AADljtJL1720VT32-VILKAB3lcG...