The assassination attempt on former President Trump is raising major questions about the Secret Service and its security protocols. Chief among them, how was a 20-year-old with a rifle able to obtain a clear line of sight? Amna Nawaz discussed more with Carol Leonnig, a reporter for The Washington Post and author of "Zero Fail: The Rise and Fall of the Secret Service." PBS News is supported by - https://www.pbs.org/newshour/about/funders
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