University of Kentucky officials are investigating two incidents in which someone hung signs that called President Barack Obama a racial epithet. On March 15, a professor noticed one such sign hanging on a door to the UK School of Law on South Limestone. He turned it in to campus police, who are investigating, said spokesman Jay Blanton. Early Thursday morning, third year law student Ches Clark said he found a sign affixed to a bus shelter on South Lime near Maxwelton Court. The sign said "How Do You Spell Nigger? OBAMA." The letters looked to be cut out of a...