City of New Orleans, Illini, & the Saluki trains passes under McCormick Place, so the last stop before Chicago is Homewood, so I bet cops at the Homewood station to sweep the trains before it heads towards Chicago, & southbound trains to be sweeped before leaving CUS. One would think Amtrak...
When I rode the Capital Limited towards Chicago this past November I remember that they started serving breakfast around 6am Eastern time, & stopped servivg after leaving the South Bend Station. The dinner car crew made announcements over the PA the night before about the morning breakfast...