The National Rifle Association’s annual conference beings today in Dallas. Around 80,000 people are expected to attend and the event is slated to feature high-profile speakers such as Texas Senator Ted Cruz, social media personalities 'Diamond and Silk,' Vice President Mike Pence, and President Donald Trump. The renown of their speakership illustrates the massive influence the N.R.A. enjoys in politics, which in turn comes partly from the organization’s longstanding success in fundraising. The Takeaway examines the N.R.A.'s outsize role in American political fundraising. Plus, we look at the fallout from a school bus drivers' "sickout" in Atlanta; the launch of NASA's first-ever probe exploring the Martian interior; former Boston Celtics player-coach Bill Russell making history 50 years ago this week; a brewing diplomatic controversy between England and Ethiopia over stolen artifacts; and a preview of this week's must-see (and must-avoid) films.

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