article_snippet: Scroll down for video .
article_snippet: The site: The bunker is underneath tennis courts where the Pan American Games will be hosted this year .
article_snippet: Police launched a large-scale investigation into the bunker when the bunker was discovered in January .
article_snippet: Reinforced with wooden walls and ceiling supports, the bunker had electricity supplied by a generator, a sump pump to remove water and a pulley system to remove dirt.
highlights_snippet: The 33-foot-long bunker lies under stadium that will host Pan Am Games .
  