Pictures posted on twitter (https://twitter.com/haya2e_jaxa/status/1335513393122316288/photo/2 and BBC (https://www.bbc.com/news/science-environment-55201662) show a couple of team members in what looks like bomb disposal gear. In the picture from the BBC people who are photographing the retrieval are in regular street clothing.
Question: What is the retrieval team being protected from?
Twitter photo:
BBC photo: