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Terrorism is an age-old concept.Some people think the first attack happened in the first century against Roman collaborators.But modern terrorism is thought to come out of mid-19th century France, when good-quality, affordable explosives hit the market and radical political movements became more prominent.It came to the U.S. during the same time frame.Today, the terrorism landscape is much different, and so is the response.The FBI says its No. 1 priority is protecting the U.S. from terrorist attacks, regardless of motivation.Terrorism investigations fall into two categories at the FBI: international terrorism and domestic terrorism.The first is when an attack is inspired by or associated with foreign organizations or nations.If the attack or attacks are meant to further a domestic influence’s goals, it’s domestic terror.The FBI’s examples of domestic terror motivations include politics, religion, race and social issues.Domestic terror “remains persistent” overall, according to the FBI.The FBI says people cross the line from exercising First Amendment freedoms to committing crimes in hopes of furthering violent agendas.Terrorism has evolved immensely since 9/11.The FBI says lone offenders and the internet have accelerated that evolution.According to the FBI, lone offenders are tougher to identify and stop because they aren’t always clearly tied to a group.And the internet — social media, in particular — helps terrorists connect with potential recruits more easily.To meet the evolving threat, law enforcement is constantly changing its approach. 1580

The CDC has recently issued guidance indicating that up to nearly one half of antibody tests are inaccurate.While early indications are that having antibodies offers some protection against reinfection, the CDC said too little is known about antibodies to determine whether it is safe for a person to no longer need to conduct social distancing. Additionally, the CDC said that a positive test should not be used at this time to determine if an individual is immune.The CDC added, “Serologic test results should not be used to make decisions about grouping persons residing in or being admitted to congregate settings, such as schools, dormitories, or correctional facilities.”The CDC said that it recommends providers use multiple antibody tests on patients, and it obtains the most accurate tests available.The CDC said that the prevalence of those testing positive for antibodies among the general population is between 5 and 25, with higher figures coming from areas with localized outbreaks. The FDA has also warned that all antibody tests can produce false results, and that “broad use of the tests, when not appropriately informed by other relevant information, such as clinical history or diagnostic test results, could identify too many false-positive individuals.” 1286

The Food and Drug Administration says Walgreens sells more tobacco products to minors than any other pharmacy chain. Now the agency wants to meet with the company to discuss its tobacco and e-cigarette sales policies.The FDA's request is part of the agency's 271

The Democratic National Committee sent a security alert to 2020 presidential campaigns Wednesday afternoon warning them not to use 143

The Democratic National Committee sent a security alert to 2020 presidential campaigns Wednesday afternoon warning them not to use 143

来源：资阳报