FILE - In this Friday, April 19, 2013 file photo, federal agents wearing hazardous material suits inspect a trash can outside the house of Paul Kevin Curtis in Corinth, Miss. Curtis is

 

              FILE - In this Friday, April 19, 2013 file photo, federal agents wearing hazardous material suits inspect a trash can outside the house of Paul Kevin Curtis in Corinth, Miss. Curtis is
FILE - In this Friday, April 19, 2013 file photo, federal agents wearing hazardous material suits inspect a trash can outside the house of Paul Kevin Curtis in Corinth, Miss. Curtis is in custody under the suspicion of sending letters covered in ricin to U.S. President Barack Obama and U.S. Sen. Roger Wicker, R-Miss. Event after nail-biting event, America was rocked this week, in rare and frightening ways, with what felt like an unremitting series of tragedies. (AP Photo/Rogelio V. Solis, File)