The failure of a steel cable and maintenance flaws contributed to the crash of a streetcar in the Portuguese capital Lisbon last month that killed 16 people and injured 21 others, according to an official preliminary report published Monday. The streetcar's derailment is one of Lisbon's worst tragedies in recent memory. The century-old streetcar, called a funicular because it travels up an down a steep hill in tandem with a second car, is a popular city tourist attraction.

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