"Unique capability to plant multiple explosives", WTF. I don't have a lot of friends, but I know someone who dives and someone else who can blow things up. Bringing the two together doesn't sound unique to my ears.
And adding "heavily sealed" doesn't changed it, what does that even mean? That they used concrete and steel to build the pipeline? Neither material is rare.
And adding "heavily sealed" doesn't changed it, what does that even mean? That they used concrete and steel to build the pipeline? Neither material is rare.