Journalist Ben Anderson gains access to three front lines in Iraq, where Sunni, Shiite and Kurdish forces are battling the Islamic State; interviews with political insiders Ryan Crocker, Ali Khedery and Dmitry Medvedev.

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Doctors and researchers make incredible strides in the fight against blindness; struggling small-scale marijuana farmers face corporate takeovers as the end of pot prohibition nears.

Source: HBO

Examining the environmental harm of industrial meat operations; assessing the depths of the world's water crisis.

Source: HBO

Examining the conflict in Yemen; exploring the ongoing battle for LGBT equal rights in the United States.

Source: HBO

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