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Jannel Rap is on the road again, singing her sister home.

The songwriter was on her way from Minneapolis to Mason City, Iowa, in a rental car on Monday.

Then to Sioux Falls, and then Lincoln before continuing to Washington, D.C., and New Jersey and Nashville and Birmingham and beyond.

She has been doing this every autumn for nearly a decade now, a siren song for the missing she calls the Squeaky Wheel Tour.

It’s her way of channeling the grief of not knowing, of reaching out to the families of the hundreds of others who have vanished, the way her sister Gina Bos did.

The 40-year-old mother of three had played at open mic night at Duggan’s Pub on Oct. 17, 2000, and then walked to her car and put her guitar in the trunk.

The car was there on 11th Street when her family went looking, the trunk ajar, but no Gina.

Her face flashed on the HuskerVision screen the following Saturday, fine-boned and smiling, and police investigated hundreds of leads.

Every time a body was found in the months that followed, and, later, every time bones were discovered, Jannel and her family held their breath.