By Team

MIAMI (CBSMiami) – Divers in the Florida Keys National Marine Sanctuary unfurled a huge American flag underwater Saturday and attached it to a historic military shipwreck to mark 20 years since 9/11.

The 30- by 40-foot flag was carried by divers about 60 feet beneath the ocean’s surface and affixed it to the kingpost of the Gen. Hoyt S. Vandenberg, the highest point of the wreck whose bottom rests in nearly 150 feet of water.

READ MORE: ‘Treating Those Immigrants Like Dogs’: North Miami Mayor Sickened By Images Of Border Patrol Agents Using Whips To Corral Haitian Immigrants

The 523-foot-long former Army troop transporter and Navy missile-tracking ship, was scuttled some 7 miles south of Key West in 2009 to become an artificial reef.

READ MORE: ‘Such A Demonic Spirit’: 70-Year-Old Man Stabbed In Random Attack At Miramar Plaza

The installation of the flag was followed by a flyover by two Navy helicopters.

MORE NEWS: Florida Cabinet Approves 13-Mile Extension Of Dolphin Expressway

The tribute was observed by boaters including relatives and friends of people who died in the terrorist attacks and their aftermath. Team