In his memoir, "The Sky Is Not the Limit: Adventures of an Urban Astrophysicist", prominent astrophysicist Neil deGrasse Tyson recounts his many encounters with police on the road and their ambiguous reasons for pulling him over. After learning about other African American physicists who have had similar encounters, he writes, "we were guilty not of DWI (driving while intoxicated), but of other violations none of us knew were on the books: DWB (driving while black), WWB (walking while black), and of course, JBB (just being black)."