In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
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Question: (CNN) -- Each year, more than 3 million Muslims commit to Hajj, the pilgrimage to Mecca that represents the fifth and final "pillar" of Islam and the largest annual human gathering on the planet. Every Muslim who is physically and financially able to do so is expected to make this pilgrimage once in their lifetime. As described in the Hadith of Gabriel, each pillar of Islam acts as a guide to day-to-day conduct for Muslims, outlining proper professions to God, prayer and spiritual mindfulness, not unlike the Book of Common Prayer for Anglicans or Judaism's Siddur. For this year's Hajj, iReporters from around the world documented their journeys, describing their experiences as they complete this Islamic sacrament. Thanks to the power of social media and platforms like CNN's iReport, they've been able to share their faith with the world, giving Muslims and non-Muslims alike a glimpse of the significance of this powerful and transformative event.More young Muslims embarking on Islamic pilgrimage than ever before2011 Hajj could be a flashpoint for global Islamic revivalPilgrimage is a defining moment in the life of MuslimsFollow iReporters as they complete their Hajj 
 Question:All pilgrims at _ are expected to dress and behave in a manner that removes all outward signifiers of wealth or social standing and focus entirely on their spiritual development.

Answer: Mecca


Question: (CNN) The mayor of Flint, Michigan, said Tuesday she needs $55 million to remove lead pipes in the city beleaguered by a toxic water crisis. She is asking that Gov. Rick Snyder partner with her to get the funds. "In order for Flint residents to once again have confidence and trust in the water coming from their faucets, all lead pipes in the city of Flint need to be replaced," Mayor Karen Weaver said. That dollar figure is what her public works staff and experts from the Lansing Board of Water and Light came up with during a meeting Monday, she said. The Lansing board pioneered lead pipe removal, the mayor said, adding that it has removed 13,500 lead pipes in Michigan's capital over 12 years.Gov. Rick Snyder is expected to ask lawmakers for an additional $195 million in funding$37 million already has been approved"We are going to restore safe drinking water one house at a time," says Flint's mayor 
 Question:Snyder is including money in his budget request on Wednesday to address _ water infrastructure.

Answer: Flint


Question: Most of the action in the Hollywood blockbuster 'The Martian' is set at the 'Ares 3' site in on Mars' southern Acidalia Planitia. The film depicts Acidalia as flat landscape that's smooth enough for stranded astronaut Mark Watney to drive over with relative ease. In reality, however, this region of Mars is far more rugged and hazardous than Ridley Scott's film suggests, according to a newly-released image by Nasa. The film, based on the book with the same title by Andy Weir, stars Matt Damon as Watney, an astronaut who is stranded on Mars after a storm causes an evacuation of his crew's habitat.Ares 3 on Acidalia Planitia is smooth in the film, but in reality images show a rough and hazardous terrainAres 4 in Arabia Terra is shown as rugged, but is in fact, relatively smooth, according to the space agencyBut overall, the film's depiction of Martian landscape is remarkably similar to images sent back by CuriosityDespite it taking place 20 years in the future, Nasa is already developing many of the technologies in the film 
 Question:'The only thing more stunning than these images is the thought that _ will be driving through those lower hills one day,' Vasavada said.

Answer:
Curiosity