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Samantha Raphelson

The growing momentum for tighter gun control after the deadly school shooting in Parkland, Fla., is highlighting the National Rifle Association's history of aggressively confronting challenges to what it regards as Second Amendment rights.

Federal limits on both research into gun violence and the release of data about guns used in crimes are powerful reminders of the lobbying group's advantages over gun control activists. For decades, the NRA pushed legislation that stifled the study and spread of information about the causes of gun violence.

The country's first private high-speed rail service is opening this month in Florida, promising to transform congested South Florida highways by taking as many as 3 million cars off the road.

Ferdie Pacheco, the ringside physician to Muhammad Ali and TV commentator known in the boxing world as the "fight doctor," died Thursday, his daughter announced on Facebook. He was 89.