Original sentence: STS-133 is slated to be the final flight of the Space Shuttle program.STS-133 will mark the final flight of Endeavour.The mission will transport the Multi-Purpose Logistics Module, and the fourth ExPRESS Logistics Carrier the the ISS
Edited sentence: The mission will mark the final flight of Endeavour, and is currently slated to be the final flight of the Space Shuttle Program.The mission will transport a Multi-Purpose Logistics Module, and the fourth ExPRESS Logistics Carrier the the ISS