 Meanwhile, federal authorities are still investigating the events that led up to the shooting. The Secret Service is facing significant criticism for its failure to prevent the tragedy with its director heading to Capitol Hill next week for questioning. And Anna Schechter joins us now. She's CBS News' Senior Coordinating Producer for Crime and Public Safety. Anna, Secret Service Director Kimberly Cheadle is going to be in the hot seat when she goes to Capitol Hill before the House Oversight Committee on Monday. What can we expect from this?