Former Presidents Bill Clinton, George W. Bush and Barack Obama — along with former first ladies Hillary Clinton, Laura Bush and Michelle Obama — are serving as honorary co-chairs for the group Welcome.US.

Welcome.US, the group said in a news release, is aimed at engaging “all Americans to welcome and support refugees, beginning with the individuals and families who fled Afghanistan” following the American withdrawal from the nation in recent weeks. After the biggest military evacuation in history, the Biden administration is now tasked with resettling more than 60,000 Afghan refugees in the US over the next several weeks.

About 17% of those who have already arrived are US citizens and lawful permanent residents and can head to their destinations without first passing through military bases. The rest, however, will go to bases to receive medical screening — including Covid-19 vaccinations — before they’re relocated to communities around the country.