Pornography in the United States has existed since the country's origins and has become more readily accessible in the 21st century. Advanced by technological development, it has gone from a hard-to-find "back alley" item, beginning in 1969 with Blue Movie by Andy Warhol, the Golden Age of Porn (1969–1984) and home video, to being more available in the country and later, starting in the 1990s, readily accessible to nearly anyone with a computer or other device connected to the Internet. The U.S. has no current plans to block explicit content from children and adolescents, as many other countries have planned or proceeded to do. Attempts made to suppress it include: outright bans, prohibitions of its sale, censorship or rating schemes that restrict audience numbers, and claims that it is prostitution and thereby subject to regulations governing prostitution. Legal decisions affecting production and consumption of pornography include those relating to its definition, its relationship with prostitution, the definition of obscenity, rulings about personal possession of pornography, and its standing in relation to freedom of expression rights. American advocates for pornography often cite the First Amendment to the United States Constitution, which guarantees freedom of speech; however, under the Miller test established by Miller v. California, anything lacking "serious literary, artistic, political, or scientific value" is generally not protected. However, the Supreme Court of the United States held in Ashcroft v. Free Speech Coalition (2002) that pornography which involves consenting adults is protected by the First Amendment, even if the models "appear to be" minors but are, in fact of lawful age, and thus has seen to protect the majority of, but not all pornography on the basis of first-amendment law. History Although pornography dates back thousands of years, its existence in the U.S. can be traced to its 18th-century origins and the influx of foreign trade and immigrants. By the end of the 18th century, France had become the leading country regarding the spread of porn pictures. Porn had become the subject of playing-cards, posters, post cards, and cabinet cards. Prior to this printers were previously limited to engravings, woodcuts, and line cuts for illustrations. As trade increased and more people immigrated from countries with less Puritanical and more relaxed attitudes toward human sexuality, the amount of available visual pornography increased. In 1880, halftone printing was used to reproduce photographs inexpensively for the first time. The invention of halftone printing took