While at CNN, Hemmer covered the bombing of the 1996 Olympics in Atlanta and spent 37 days in Tallahassee, Florida, during the Florida election recount of the 2000 U.S. presidential election.
In May 2001, Hemmer played an instrumental role in the network's coverage of the Timothy McVeigh execution, reporting from Terre Haute, Indiana, where McVeigh was put to death for his part in the Oklahoma City bombing [REF].