The whistle blows in short bursts: PHWEEE! PHWEEE! PHWEEE! PHWEEE! Code: ICE is nearby. Then comes the long blast: PHWEEEEEEEEEEE! Code: ICE has taken someone. These are the codes immigrant rapid responders are using to alert their neighbors and co-workers to ICE sightings and kidnappings. Federal agents are armed with military-style weapons. Up against them, everyday people have whistles, boundless courage, and the acronym S.A.L.U.T.E.