Still very little is known about the whereabouts of missing Malaysia Airlines Flight 370 on the third anniversary of its disappearance. On Wednesday, the Australian official in charge of the now suspended search told an audience at a church service that he's still hopeful the plane will be found. A memorial to the passengers is being built in the city of Perth, where much of the search operations have been based in, reports The Globe and Mail.
Here is a look at the unprecedented international effort to solve what has become one of modern aviation's greatest mysteries.
Authorities announced in January 2017 that the search for missing Malaysia Airlines flight 370 has been suspended, after unsuccessfully searching for the aircraft for nearly three years. The airplane vanished from radar on March 8, 2014, with 239 people on board. Since then, nothing has been seen of the plane except for pieces of debris that floated far from the original crash site.
The area the plane went down in is considered one of the most remote in the world.
At one point, the search covered an area nearly the size of the United States.
One of the initial search areas west of Perth was so remote that it took three hours just to get there by plane.
A piece of debris found on a French beach was confirmed as part of missing Malaysian Flight 370, Malaysian Prime Minister Najib Razak said Aug. 5, 2015.
Crews then had only a couple hours to search before having to return so they didn't run out of fuel.
Investigators initially focused on an area in the South China Sea, where the plane was last detected at a normal cruising altitude of 35,000 feet in the early hours of March 8, 2014.
Crews then focused their efforts on an area 1,500 miles west of Perth after several reports of debris being spotted. Here, members of the Australian Defense Force drop data markers over possible debris fields.
The search later went underwater, with the U.S. military bringing in a "ping detector" in an attempt to pick up data from the airliner's black box. In this handout image provided by the Australian Department of Defense, a Phoenix underwater drone Bluefin-21 is lifted over the side of Australian naval vessel Ocean Shield on April 14, 2014.
The debris found on the remote western Indian Ocean island of Reunion on July 29, 2015, was called "a very significant development" in the search for Flight 370. Investigators believe the plane went down in the southeastern Indian Ocean, and searchers have been looking for the bulk of the plane at the bottom of the ocean off western Australia. Officials say Reunion is within the range of where debris from the missing plane could have drifted.
The debris was the first physical piece of evidence discovered in the search until independent searchers found more debris on March 2, 2015.
American Blaine Gibson had chartered a boat for a weekend trip off the coast of Mozambique and found the plane part washed ashore on a sandbar after it was spotted by the boat's captain. He is also part of an independent group that interpreted data in a bid to find the missing plane. It's not unusual for private people and companies to get involved in searches for missing planes, especially when the search has gone on for a long time.
The wreckage is a piece of horizontal stabilizer skin, the U.S. official said, the part of the aircraft's tail that keeps horizontal as the plane flies. It measures about 35 inches by 22 inches and is apparently from a Boeing 777, like the missing MH370 airliner. The debris includes a fastener, which an executive at the fastener company, LISI Aerospace, said is a pretty standard part.