President Trump’s body language can tell us a lot about his thoughts and feelings.The White House is hosting two major European leaders at the White House this week. Analysts and body language experts are noting the contrast in his warm embrace of French President Emmanuel Macron and frostier past encounters with German Chancellor Angela Merkel.

ON THIS DAY IN AMERICAN HISTORY On April 26, 1954, polio vaccine trials begin at an elementary school in McLean, Virginia. About 1.8 million children in the United States, Canada and Finland participate in the trials and, the following year, researchers declare the vaccine safe and effective. The Salk polio vaccine becomes a standard childhood immunization in America, eventually almost completely wiping out the highly contagious disease in the Western Hemisphere.

VIDEO: The world’s biggest library belongs to the American people. The Library of Congress celebrates its 218th birthday this week. From modest beginnings — $5,000 allotted by President John Adams to launch the collection — to tens of millions of items today, the Library of Congress even boasts a couple of ghosts.

The distractions are piling up President Trump. From the Russia investigation to adult film actress Stormy Daniels to the scrutiny law enforcement is focusing on his personal lawyer, Michael Cohen, the president faces mounting legal challenges.The increased scrutiny of Trump’s long relationship with Cohen could become a serious problem for the president.

VIDEO: An American German-Catholic woman who converted to Islam decided to design modest clothes after she couldn’t find what she was looking for in stores. Macy’s, the nationwide department store, is now carrying Lisa Vogl’s designs on its website. In an interview with VOA, Vogl dismisses critics who say her fashion line condones the repression of women.

A caravan of Central American migrants crossing north toward the United Stateshas arrived on the US-Mexico border, where fear of persecution at home has led many of them to apply for asylum in the US. Others, who are not optimistic about their chances of entering the US, have decided to stop short of their American dream.