*8th District Congressman Raja Krishnamoorthi tells John why he opposes the proposed $31 billion railway merger.

*Washington Post Sports Journalist Sally Jenkins tries to discern the point when performance enhancement becomes cheating.

*Gina Sunseri reports from Houston after NASA announced the results of last month's DART mission.

*ABC's Jason Nathanson shares the details of the inappropriate incident involving Bill Murray that shut down his recent film.

*Plus, Adam Rubin of the Chicago Architecture Center previews this year's upcoming Open House Chicago event.

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