The US Department of Energy or DOE are looking to put more security on the Savannah River Site. Centerra have the job now, and are going on strike so the DOE will not get it. The Centerra are earning good money, so they want to keep the job.
This container ship is named Zim Istanbul. It is going up the Savannah River carrying tons of cargo. Thousands of ships like this one go on the river every year.