The derailing happened where an old piece of rail from 1989 was soldered to a new rail[1]. [1]: https://www.elmundo.es/economia/2026/01/24/69751757e85ecebc3e8b

The derailing happened where an old piece of rail from 1989 was soldered to a new rail[1]. [1]: https://www.elmundo.es/economia/2026/01/24/69751757e85ecebc3e8b4577.html https://www.elmundo.es/economia/2026/01/24/69751757e85ecebc3...