The men worked quickly from their small boat, blocking off a section of Mississippi River shoreline with giant yellow floating barriers. The goal? To keep thousands of gallons of imaginary vegetable oil pouring from a derailed train from reaching an environmentally sensitive area.
It was one of three scenarios played out at various points of the river near the Twin Cities on Thursday as part of a training exercise to prepare for an actual large-scale pollution or security crisis on the river.
In all, 34 government agencies and private companies took part in what the U.S. Coast Guard calls its Area Maritime Security Training and Exercise Program.
Participants had the rare chance to practice the sort of collaboration required during a crisis.
"As much as we do often work together, it's not to this scale," said Petty Officer Alexandria Preston, a Coast Guard spokeswoman. "We're kind of building that cohesiveness with the other agencies so we can accomplish our common goals."
Each government agency involved, including various departments in St. Paul, the Minneapolis Fire Department, the FBI and the Environmental Protection Agency (EPA), has different equipment, laws to obey and ways of doing things, Preston said, so such rehearsals are key.
The agencies planned to assess how well the various emergency plans worked so they could be fine tuned.
Besides the oil spill, other scenarios included a riverboat hijacking in St. Paul and an underwater improvised explosive device attached to a passenger vessel in Minneapolis. A dive team located and dismantled it.