The 2012 Buenos Aires rail disaster, also known as the Once Tragedy, occurred on 22 February 2012, when a train crashed at Once Station in the Balvanera neighbourhood of Buenos Aires, Argentina.
The train after crashing
Buenos Aires' then-chief of government Mauricio Macri thanking the rescuers
Protest asking for justice in February 2013
The "5†1" logo displaying the number of victims in the accident became popular in protests and other public acts asking for justice
Telescoping (rail cars)
Videos
In a railway accident, telescoping occurs when the underframe of one vehicle overrides that of another, and smashes through the second vehicle's body. The term is derived from the resulting appearance
2012 Buenos Aires rail disaster
…crashed into the buffer stops at a speed of 20 km/h (12 mph). The motor carriage and the following two carriages were crushed; the second carriage was telescoped 7 metres (23 ft) into the first. Several passengers described the impact as an explosion. Several ambulances were in the area at the time of the accident…
The aftermath of the June 2009 Washington Metro train collision
The aftermath of the 1898 St Johns rail accident, where the rear two carriages of a passenger train were telescoped by being hit at 8 mph (13 km/h) by a following train.
Cars involved in the Mud Run disaster, October 10, 1888