Aug. 28 (UPI) -- On this date in history:
In 1922, a New York City realty company paid $100 for the first radio commercial, on station WEAF.
In 1955, while visiting family members in Money, Miss., 14-year-old Emmett Till, an African American man from Chicago, was slain for supposedly flirting with a white woman four days earlier. His alleged killers were acquitted.
In 1981, John Hinckley Jr. pleaded not guilty to attempting to assassinate President Ronald Reagan on March 30, 1981. The next year he was found not guilty by reason of insanity and was institutionalized for mental health treatment. He was conditionally released in September 2016.
In 1986, Soviet spy Jerry Whitworth was sentenced to 365 years in prison and fined $410,000.
In 1990, a tornado struck Will County in Illinois, southwest of Chicago, killing at least 27 people and injuring more than 350.
In 2005, Hurricane Katrina picked up strength as it roared toward the U.S. Gulf Coast, reaching Category 5 status, with winds of almost 150 miles an hour, touching off one of the largest evacuations in U.S. history.
In 2011, Tony Tan was elected the seventh president of Singapore after more than 83 percent of eligible voters cast their ballots.
In 2013, U.S. Army Maj. Nidal Malik Hassan, who admitted to killing 13 people and wounding many others at Fort Hood in Texas in 2009, was sentenced to death.
In 2014, a World Health Organization report said an Ebola epidemic had killed more than 1,552 people in four West African countries: Guinea, Liberia, Nigeria and Sierra Leone.