2014 Event Australia bans all visas from the Ebola-hit nations of Guinea, Liberia and Sierra Leone; the nation's officials state that this is required to preserve public health, but health experts have criticized the policy 2012 Event U. K. government officials announce that Viaspan, a solution used to preserve some donor organs, could be contaminated with bacteria after tests identified Bacillus cereus was present in the solution used to test Viaspan's sterility 2011 Event The U.S. Library of Congress intends to preserve the thriller 'Silence of the Lambs' as part of its National Film Registry 1989 Event Kenya announces worldwide ban on ivory to preserve its elephant herds 1979 Event Supreme Court strikes down (6-3) Pennsylvania law requiring doctors performing an abortion to try to preserve lives of potentially viable fetuses 1960 Event Key Largo Coral Reef Preserve established, 1st underwater park 1929 Event U.S. and Canada agree to preserve Niagara Falls 1870 Event 1st U.S. National Wildlife Preserve, Lake Meritt in Oakland California 1861 Event Washington D.C. - Crittenden resolution is passed stating that the war is to be fought to preserve union and uphold the Constitution, not to alter slavery