Worship Music is the tenth studio album by American heavy metal band Anthrax. It is their first album of original material since 2003's We've Come for You All and the first to feature original singer Joey Belladonna since 1990's Persistence of Time.

In the fall of 2001 envelopes carrying deadly Anthrax were delivered to U.S. Senate offices, network news divisions, and a tabloid newspaper. Five people were killed, many more infected and the nation was terrorized. Seven years later, after mistakenly pursuing one suspect, the most expensive and complex investigation ever undertaken by the FBI ended when they identified Army scientist Dr. Bruce Ivins as the sole perpetrator of the attacks--after Ivins had taken his own life. Now, new questions are being raised about the FBI's investigative methods and whether Ivins really did it. FRONTLINE, in a co-production with ProPublica, and McClatchy Newspapers, takes a hard look at the FBI's investigation of the country's most notorious act of bioterrorism.

In the fall of 2001, envelopes carrying deadly anthrax were delivered to US Senate offices, network news divisions, and a tabloid newspaper. Five people were killed, many more infected, and the nation was terrorized. Seven years later, after mistakenly pursuing one suspect, one of the most expensive and complex investigations ever undertaken by the FBI ended when they identified Army scientist Dr. Bruce Ivins as the sole perpetrator of the attacks - after Ivins had taken his own life. Now, new questions are being raised about the FBI's investigative methods and whether Ivins really did it. FRONTLINE, in a co-production with ProPublica, and McClatchy Newspapers, takes a hard look at the FBI's investigation of the country's most notorious act of bioterrorism.

In the fall of 2001, envelopes carrying deadly anthrax were delivered to US Senate offices, network news divisions, and a tabloid newspaper. Five people were killed, many more infected, and the nation was terrorized. Seven years later, after mistakenly pursuing one suspect, one of the most expensive and complex investigations ever undertaken by the FBI ended when they identified Army scientist Dr. Bruce Ivins as the sole perpetrator of the attacks - after Ivins had taken his own life. Now, new questions are being raised about the FBI's investigative methods and whether Ivins really did it. FRONTLINE, in a co-production with ProPublica, and McClatchy Newspapers, takes a hard look at the FBI's investigation of the country's most notorious act of bioterrorism.

In the fall of 2001, envelopes carrying deadly anthrax were delivered to US Senate offices, network news divisions, and a tabloid newspaper. Five people were killed, many more infected, and the nation was terrorized. Seven years later, after mistakenly pursuing one suspect, one of the most expensive and complex investigations ever undertaken by the FBI ended when they identified Army scientist Dr. Bruce Ivins as the sole perpetrator of the attacks - after Ivins had taken his own life. Now, new questions are being raised about the FBI's investigative methods and whether Ivins really did it. FRONTLINE, in a co-production with ProPublica, and McClatchy Newspapers, takes a hard look at the FBI's investigation of the country's most notorious act of bioterrorism.