On October 9, 1995 an Amtrak train derailed near Palo Verde, Arizona in the southwest US, killing one and wounding 78.
Maoist Naxalite terrorists were believed behind the derailment of a Delhi-Calcutta express rrain in 2002 in which as many as 200 were killed.
A mass casualty terrorist attack on a train in Belgium by a jihadi armed with a gun and knife was averted when three US servicemen tackled the assailant.
On this day in 2004, ten bombs placed on four trains detonated during the morning commute in Madrid, killing 191 and leaving and more than 1,600 wounded.
Train security is generally understated which makes you wonder why there are not more terrorist attacks on these modes of transportation.