ATLANTA - Testing, testing, 1, 2, 3.The Centers for Disease Control and Prevention (CDC) has updated its guidance on international travel, urging Americans going abroad to get tested for COVID-19 at three different times: before, during and after the big trip.The public health institute shared the news over the weekend, stressing that while testing cannot eliminate risk, it can help make travel safer for all.“Air travel requires spending time in security lines and airport terminals, which can bring you in close contact with other people and frequently touched surfaces,” the CDC said in the Saturday memo. “Social distancing is difficult in busy airports and on crowded flights, and sitting within 6 feet of others, sometimes for hours, may.