distribution of tracts such as The Present Truth, which was published by James White as early as 1849. Until J. N. Andrews was sent to Switzerland in 1874, Adventist global efforts consisted entirely of the posting of tracts such as White's to various locations. In the last century, these efforts have also made use of emerging media such as radio and television. The first of these was H. M. S. Richards' radio show Voice of Prophecy, which was initially broadcast in Los Angeles in 1929. Since then, Adventists have been on the forefront of media evangelism; It Is Written, founded by George Vandeman, was the first religious program to air on color television in March 1965 and the first major Christian ministry to utilize satellite uplink technology. Amazing Facts was founded in 1965 by Joe Crews in Baltimore as a radio ministry. Amazing Facts broadcasts "Bible Answers Live" each Sunday where listeners phone or email Bible questions which are answered live. Today the Hope Channel, the official television network of the church which launched in October 2003, operates 8+ international channels broadcasting 24 hours a day on cable, satellite, and the Web. Adventist World Radio was founded in 1971 and is the "radio mission arm" of the Seventh-day Adventist Church. It utilizes AM, FM, shortwave, satellite, podcasting, and the Internet, broadcasting in 77 major language groups of the world with a potential coverage of 80% of the world's population. AWR's headquarters is in Silver Spring, Maryland, with studios throughout the world. A large portion of the ministry's income is derived from membership gifts. SDA evangelists such as Doug Batchelor, Mark Finley and Dwight Nelson have undertaken a number of international satellite-broadcast live evangelistic events, addressing audiences in up to 40 languages simultaneously. In 2016, the Church released the film Tell the World. Publishing The Adventist Church owns and operates many publishing companies around the world. Two of the largest are the Pacific Press and Review and Herald publishing associations, both located in the United States. The Review and Herald is headquartered in Hagerstown, Maryland. Ecumenical activity The Adventist Church generally opposes the ecumenical movement, although it supports some of the other goals of ecumenism. The General Conference has released an official statement concerning the Adventist position with respect to the ecumenical movement, which contains the following paragraph: Should Adventists cooperate ecumenically? Adventists should cooperate insofar as the authentic gospel is