" 'The Propaganda Model: A Retrospective,' Against All Reason, December 9, 2003. Klaehn, Jeffery (ed . ) Filtering the News: Essays on Herman and Chomsky's Propaganda Model. Edinburgh: Black Rose, 2005. . . . Glider Model Rocket. . "

" Since the completion of the Standard Model, many efforts have been made to address these problems. One attempt to address the first defect is known as grand unification. The so-called grand unified theories (GUTs) hypothesized that the SU(3), SU(2), and U(1) groups are actually subgroups of a single large symmetry group. At high energies (far beyond the reach of current experiments), the symmetry of the unifying group is preserved; at low energies, it reduces to SU(3)×SU(2)×U(1) by a process known as spontaneous symmetry breaking. The first theory of this kind was proposed in 1974 by Georgi and Glashow, using SU(5) as the unifying group. A distinguishing characteristic of these GUTs is that, unlike the Standard model, they predict the existence of proton decay. In 1999, the Super-Kamiokande neutrino observatory reported that it had not detected proton decay, establishing a lower limit on the proton half-life of 6. Model Photo Rocket7× 1032 years. This and other experiments have falsified numerous GUTs, including SU(5). "