"We have breaking news tonight here in New York City — very sad news. CBS News tonight has announced the death of long time correspondent Bob Simon, whose career spanned five decades," said Lawrence O'Donnell on MSNBC.
"Bob Simon was the best of the best. A reporter's reporter. ... Generous, kind, sharp as a tack and obviously someone who would never hesitate to ask hard questions, but he would ask them kindly," said Randall Pinkston on Al Jazeera.
Others reminisced about the journalist's five-decade career — one in which he reported on the Vietnam War, conflicts in the Middle East and was even held captive in Iraqi prisons for some 40 days.
"He covered virtually every major overseas conflict in the 1960s, most notably in the Middle East," recounted Anderson Cooper on CNN.
"He was a '60 Minutes' correspondent for 19 seasons. This was his 19th season. He just had a report on this Sunday about Selma," said Brian Stelter on CNN.
Simon is survived by his wife and one daughter, who is a producer for "60 Minutes."