Question: When was the wreck of the Titanic discovered?
About the article "Sinking of the RMS Titanic", section "Cultural aftermath and wreckage".

Candidate passages:
The 2000 expedition by RMS Titanic Inc. carried out 28 dives during which over 800 artefacts were recovered, including the ship's engine telegraphs, perfume vials and watertight door gears.
In 2001, an American couple – David Leibowitz and Kimberly Miller – caused controversy when they were married aboard a submersible that had set down on the bow of "Titanic", in a deliberate echo of a famous scene from James Cameron's 1997 film.
The wedding was essentially a publicity stunt, sponsored by a British company called SubSea Explorer which had offered a free dive to "Titanic" that Leibowitz had won.
He asked whether his fiancée could come too and was told that she could – but only if she agreed to get married during the trip.
The same company also brought along Philip Littlejohn, the grandson of one of "Titanic"s surviving crew members, who became the first relative of a "Titanic" passenger or crew member to visit the wreck.
Cameron himself also returned to "Titanic" in 2001 to carry out filming for Walt Disney Pictures' "Ghosts of the Abyss", filmed in 3D.
In 2003 and 2004, the US National Oceanic and Atmospheric Administration carried out two expeditions to "Titanic".
The first, carried out between 22 June and 2 July 2003, performed four dives in two days.
Its key aims were to assess the current condition of the wreck site and carry out scientific observations to support ongoing research.
The stern section, which had previously received relatively little attention from explorers, was specifically targeted for analysis.
The microbial colonies aboard "Titanic" were also a key focus of investigation.
The second expedition, from 27 May – 12 June 2004, saw the return of Robert Ballard to "Titanic" nearly 20 years after he discovered it.
The expedition spent 11 days on the wreck, carrying out high-resolution mapping using video and stereoscopic still images.2005 saw two expeditions to the "Titanic".
James Cameron returned to the "Titanic" for the third and last time to film "Last Mysteries of the Titanic", as the "Titanic", and has claimed that this will wrap up "my 10-year odyssey with the "Titanic", and I won't be coming back here", because the "Titanic", having been underwater for 93 years, was showing very severe signs of deterioration in the foremast, the boat deck, the Marconi rooms, and the stern's condition was explained via NOAA, because in his 1995 and 2005 expeditions to the "Titanic", Cameron did not explore the stern of the wreck due to this part of the "Titanic" being in even worse condition than the bow.
It also saw another expedition, "Titanic's Final Moments: Missing Pieces", which began looking for pieces of the "Titanic" never before seen in the debris field.RMS Titanic Inc. mounted further expeditions to "Titanic" in 2004 and 2010, when the first comprehensive map of the entire debris field was produced.
Two autonomous underwater vehicles – torpedo-shaped robots – repeatedly ran backwards and forwards across the debris field, taking sonar scans and over 130,000 high-resolution images.
This enabled a detailed photomosaic of the debris field to be created for the first time, giving scientists a much clearer view of the dynamics of the ship's sinking.
Several hiccups happened during this expedition, as several hurricanes were passing over the wreck site, and the team got the "Remora" ROV caught in a piece of wreckage in the "Titanic"s expansion joint, and carefully had to get the robot out of the expansion joint to avoid damaging the "Titanic", as the "Titanic", having been underwater for 98 years, was in very fragile condition, and one of the AUVs, Ginger, was weighed down by a piece of the lead anchor discovered in 2005.
This same year saw the discovery of the new bacteria living in the rusticles on the "Titanic", "Halomonas titanicae".
Tourist and scientific visits to "Titanic" are still continuing; by April 2012, 100 years since the disaster and nearly 25 since the discovery of the wreck, around 140 people had visited.
On 14 April 2012 (the 100th anniversary of the ship's sinking), the wreck of the "Titanic" became eligible for protection as a UNESCO World Heritage Site, and in the same month, Robert Ballard, the wreck's discoverer, has announced of a plan to preserve the wreck of the "Titanic" by using deep-sea robots to paint the wreck with anti-fouling paint, to help keep the wreck in its current state for all time.
The proposed plan that Ballard announced has been outlined in a documentary made to time with the Titanic's 100th sinking anniversary called "Save the Titanic With Bob Ballard" where Ballard himself talks about how this proposed paint job on the wreck will work.
Ballard says that the reason he has proposed to robotically clean and repaint the "Titanic" with a colour scheme that mimics the rusticles is because when "I visited the "Titanic" in 1986, I saw original anti-fouling paint on the ship's hull which was still working even after 74 years on the seabed". 
Wrecks and expeditions.
When "Titanic" sank in 1912 and "Britannic" sank in 1916, their sinkings did not receive the same attention, due to the death toll (1,517 on "Titanic" and 30 on "Britannic").
Because the exact position of the sinking of the "Britannic" is known and the location is shallow, the wreck was discovered relatively easily in 1975.
"Titanic", however, drew everyone's attention in 1912.
After several attempts, the wreck was finally located by Jean-Louis Michel of Ifremer and Robert Ballard following a secret mission for the U.S. Navy.
The discovery of the wreck occurred on 1 September 1985, at 25 kilometres from the position given of the sinking.
The wreck lies about 4,000 metres deep, broken in two.
The bow is relatively well preserved, but the stern partially imploded, and to a large extent disintegrated during the descent and impact on the seabed.
The wreck of "Britannic" was discovered in 1975 by Jacques-Yves Cousteau.
It has a large tear in the front caused by the bend of the bow when the ship rolled over.
She has been, after the discovery, regularly seen as part of many other expeditions.
In contrast to Titanic, which lies at the very bottom of the North Atlantic and is being fed on by iron-eating bacteria, the current wreck of Britannic is in remarkably good condition, and is much more accessible than her infamous sister.
Many external structural features are still intact, including her huge propellers, and a great deal of her superstructure and hull. 
Mary died on July 29, 1987 in Syracuse, New York at age 104.
She was the longest-lived "Titanic" survivor, and one of only about 30 that were alive when the "Titanic"s wreckage was discovered in 1985. 
Halomonas titanicae is a species of bacteria which was found on rusticles in the wreck of the RMS "Titanic".
Dr Henrietta Mann discovered the bacteria when analysing rusticle samples taken from the "Titanic" in 1991.
She assumes the bacteria is eating the "Titanic"'s metal at a rapid speed, but this is exaggerated.
When asked how long it will be until "Titanic" becomes a pile of rust on the sea floor, she has said "I don't know the speed of the bacteria eating the iron, but it seems by comparing earlier photos with the latest rapid change is occurring.
Maybe in 20 or 30 years the wreck will collapse into a heap of rust."
Another estimate is that "Titanic" may have 15 or 20 years before she collapses.
The bacteria has been listed as potentially dangerous to oil rigs and man-made objects in the deep sea, although an advantage to Halomonas titanicae's discovery is that old ships that litter the sea floor will be recycled by this bacterium.  
The R.M.S.
"Titanic" Maritime Memorial Act of 1986 (, ) is a United States Act of Congress that was passed to designate the wreck of the RMS Titanic as an international maritime memorial and to regulate the research, exploration and salvage of the wreckage.
The Act became law on October 21, 1986, when it was passed by the 99th United States Congress.