A piece of metal found near a train crash site in Spain is thought to be a crucial part of the investigation. Known as a bogie, this undercarriage component could reveal why the accident happened. The discovery highlights the ongoing efforts to find answers in the tragic incident.

A heavy piece of metal recovered near the scene of Spain’s deadliest rail disaster in years may be the missing undercarriage component

A large piece of metal discovered near the site of a high-speed train crash in Spain may be the crucial missing undercarriage component investigators have been searching for to determine the accident's cause, a source and experts said on Wednesday.