By Daniel Trotta NEW YORK (Reuters) - The Parkland, Florida, school massacre has had little lasting impact on U.S. views on gun control, three months after the shooting deaths of 17 people propelled a national movement by some student survivors, a Reuters/Ipsos poll showed on Wednesday. While U.S. public support for more gun control measures has grown slowly but steadily over the years, it typically spikes immediately after the mass shootings that have become part of the U.S. landscape, then falls back to pre-massacre levels within a few months. The poll found that 69 percent of American adults supported strong or moderate regulations or restrictions for firearms, down from 75 percent in late March, when the first poll was conducted following the Valentine's Day shooting at Marjory Stoneman Douglas High School in Parkland.



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