MASSENA, N.Y. -- Rear Adm. Peter V. Neffenger, Commander, Ninth Coast Guard District, and Lt. Cmdr. Vasilios Tasikas, Commanding Officer of Coast Guard Cutter Mobile Bay, explain the operation of the Locks System in the St. Lawrence Seaway to Susan Eisenhower, granddaughter of President Dwight D. Eisenhower, aboard the Coast Guard Cutter Mobile Bay before a ceremony celebrating the 50th anniversary of the St. Lawrence Seaway, Friday, July 10, 2009. The Seaway is a deep-draft waterway extending 2,340 miles from the Atlantic Ocean to the Great Lakes. (U.S. Coast Guard photo/PA3 George Degener)