Charles Ernest "Chuck" Grassley (born September 17, 1933) is the senior United States Senator from Iowa, serving since 1981. A member of Republican Party, he previously served in the served in the United States House of Representatives (1975–1981) and the Iowa state legislature (1959–1974). He was chairman of the Senate Finance Committee from January to June 2001 and from January 2003 to December 2006. He is currently the ranking Republican on the Judiciary Committee.

Grassley was born in New Hartford, Iowa, the son of Ruth (née Corwin) and Louis Arthur Grassley, and graduated from the town high school. At Iowa State Teachers College (now the University of Northern Iowa), he earned a B.A. in 1955 and an M.A. in 1956. Also during the 1950s, Grassley farmed and worked in factories, first as a sheet metal shearer and then as an assembly line worker. He studied toward a Ph.D. in political science at the University of Iowa. In 1967-1968 Grassley taught at the now-defunct Charles City College.

Steven Tyler (born Steven Victor Tallaricco; March 26, 1948) is an American singer, songwriter, and multi-instrumentalist, best known as the frontman and lead singer of the Boston-based rock band Aerosmith, in which he also plays the harmonica, and occasional piano and percussion. He is known as the "Demon of Screamin'" due to his high screams and his wide vocal range. He is also known for his on-stage acrobatics. During his high-energy performances, he usually dresses in bright, colorful outfits with his trademark scarves hanging from his microphone stand. In the 1970s, Tyler rose to prominence as the frontman of Aerosmith, which released such milestone hard rock albums as Toys in the Attic and Rocks. In the late 1970s and early 1980s, Tyler had a heavy drug and alcohol addiction, and the band's popularity waned.

He completed drug rehabilitation in 1986 and subsequently maintained sobriety for years, but had a relapse with prescription painkillers in the late 2000s, for which he successfully received treatment in 2009. After Aerosmith launched a remarkable comeback in the late 1980s and early 1990s with the albums Permanent Vacation, Pump, and Get a Grip, Tyler became a household name and has remained a relevant rock icon. As a result, he has since embarked on several solo endeavors including guest appearances on other artists' music, film and TV roles (including as a judge on American Idol), authoring a bestselling book, and solo work (including a Top 40 hit single in 2011). However, he has continued to record music and perform with Aerosmith, after more than 41 years in the band. He is included among Rolling Stone's 100 Greatest Singers. He was also ranked 3rd on Hit Parader's Top 100 Metal Vocalists of All Time. In 2001 he was inducted into the Rock and Roll Hall of Fame with Aerosmith, and he was the presenter when AC/DC was inducted into the Hall of Fame in 2003.