and on March 4 the US government ordered the removal of seven pages of The Finished Mystery if distribution was to continue. In early May 1918 US Attorney General Thomas Watt Gregory condemned the book as dangerous propaganda and days later warrants were issued for the arrest of Rutherford and seven other Watch Tower directors and officers on charges of sedition under the Espionage Act amid claims they were conspiring to cause disloyalty and encouraging the refusal of military duty. On June 21 seven of them, including Rutherford, were sentenced to 20 years' imprisonment. They were released on bail in March 1919 after an appeals court ruled they had been wrongly convicted and in May 1920 the government announced all charges had been dropped. On his release from prison, Rutherford began a major reorganization of Bible Student activities. The Watch Tower Society set up its own printing establishment and in 1919 Rutherford founded the magazine The Golden Age (now Awake!), which the Bible Students began distributing in response to an increasing emphasis by the Brooklyn headquarters on door-to-door preaching. Brooklyn appointed a "director" in each congregation in 1919, and a year later directed all congregation members who participated in the preaching work to report weekly on their witnessing activity. As the Bible Students' preaching work expanded, Rutherford moved to take greater control over their message in a bid to unify the message and become the spokesman for the organization. Major annual conventions were organized from 1922 and 1928, which were as much publicity events as spiritual gatherings. At an eight-day assembly at Cedar Point, Ohio in 1922 he launched a series of international conventions under the theme "Advertise the King and Kingdom", attracting crowds of up to 20,000, who were urged to "herald the message far and wide". "Behold the King!" Rutherford told conventioners. "You are his publicity agents." He stressed that the prime purpose of all Bible Students was to preach publicly in fulfillment of Matthew 24:14, especially in the form of door-to-door evangelism with the Society's publications, rather than prayer, meditation or Bible study. The traditional Bible Student prayer and testimony meetings were divided into two parts with one becoming a "service meeting", devoted to promoting public preaching. In 1924, he expanded his means of spreading the Watch Tower message with the start of 15-minute radio broadcasts, initially from WBBR, based on Staten Island, and eventually via a