A stretch of highway in Illinois will honor the bravery and sacrifice of the Tuskegee Airmen.

Governor Pat Quinn helped unveil a sign for the Tuskegee Airmen Memorial Trail on Monday.

The sign will be placed along a stretch of Interstate 57 which runs south of Chicago.

Officials say the Fighter Group was the first black unit to fly in the U-S military.

They also say their service was an important part of breaking racial barriers during World War Two.