A new flyer by the WIL and El Militante Sin Fronteras for use on Labor Day and beyond. Click here for the new WIL and EMSF flyer – Why We Oppose "Guest Worker" Programs. A new flyer by the WIL and El Militante Sin Fronteras for use on Labor Day and beyond. Click here for the new WIL and EMSF flyer – Why We Oppose "Guest Worker" Programs.