John Daly, a journalist and World War II correspondent who later became known to millions as the witty, urbane host of television's "What's My Line," died Sunday at his home at age 77.

Daly suffered from emphysema but was believed to have died of cardiac arrest, said Lila Bader, his longtime assistant.Born in South Africa, Daly moved to this country as a boy.

He went to work for CBS in 1937, eventually covering the White House and reporting on World War II from Europe and the Middle East. He moved to ABC in 1949, where he was vice president in charge of news operations from 1953 to 1960.

From 1950 to 1967 he was moderator of "What's My Line," in which a panel of regulars tried to guess the unusual and offbeat occupations of guests, before donning blindfolds and trying to name the identity of a celebrity "mystery guest."

Its 18 years on prime-time television made it the longest-running game show.

Survivors included his wife, Virginia, and six children.