Which defense secretary under JFK and LBJ made repeated visits to South Vietnam in the 1960s?

As Rev. Clayton Brooks, Dick Van Dyke leads a townwide effort to quit smoking in which 1971 film? As runner-up in the first season of which reality show did Kelly Wiglesworth win $100,000? Which child actor played the Amish boy Samuel Lapp in the 1985 film "Witness"? As Heinrich Schliemann is to Troy, Leonard Woolley is to which ancient city? As secretary of war from 1904 to 1908, William Howard Taft oversaw construction of which waterway? As the temptress Lola Lola, who sang "Falling in Love Again" in the 1930 film "The Blue Angel"? As the 1932 Democratic candidate for president, who promised to end Prohibition? As the 1943 winner of which national title did Jean Bartel sell about $2.5 million in war bonds?