On Friday afternoon, Amazon employees gazing from the windows of the tech behemoth's South Lake Union headquarters caught a glimpse of hundreds of devout Muslims, clergy, labor unionists and some of their fellow workers engaged in a mass prayer demonstration to support  some of the company's subcontractors who see Amazon's current policies as religiously discriminatory.

Security Industry Specialists (SIS), based in California, was hired by Amazon to provide security services for its sprawling campus. While Amazon has provided prayer rooms for its high-level Muslim employees, others working at lower-wage jobs for SIS have no access to those rooms.

Those at Friday's pray-in want Amazon to make those rooms available to all Muslims working in their buildings, including those employed by its subcontractors.

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