Legendary 60 Minutes reporter Mike Wallace passed away at the age of 93 at his home in New Haven, CT on Saturday. His intense style of investigative reporting made him one of the most dreaded yet effective journalists in the business, capable of extracting the tough answers from his high-profile interviewees with his brazen approach.

As we remember his legacy from his 38 year career on 60 Minutes, we’re taking a look back at some of his most hard-hitting interviews with celebrity guests like Barbra Streisand, Richard Nixon, Ayatollah Khomeini, Nancy Reagan and many others. Plus, we found some of his classic TV endorsements for cigarettes in the late ’50s.

CBS News collected some of Mike Wallace’s most talked about interviews from his career spanning from his debut on 60 Minutes in 1968 until his retirement in 2006. Take a look at some of his best interview clips making celebrities squirm in the hot seat from his tough questions over the years.

Next Sunday, April 15th, 60 Minutes will have a special program dedicated in remembrance of Mike Wallace.

Mike Wallace endorsing Philip Morris cigarettes: