This is going to be more nonsense about implausible terrorists stealing superweapons, but fuck it, train movie, it's --

#56, or #1100, 1995's "Under Siege 2: Dark Territory."

#56, or #706, we Spielberg ever onwards, 2015's "Bridge of Spies."

Not one of the better known Spielbergs, no idea what it's about besides, presumably, bridge (singular) and spies (plural).