As President Beck, which actor tells America that the sky is falling in 1998's "Deep Impact"?

As part of his plan to conquer the universe in a 1940 movie serial, who spread "Purple Death" dust over Earth? As part of which crisis did John F. Kennedy announce a naval blockade on October 22, 1962? Since Pennsylvania had no coast, William Penn was given land in 1682 that later became which small state? In 2001, President George W. Bush asked American children to send $1 each to help children in which country? As president of the Mormon church, who laid a cornerstone for the Salt Lake Temple in 1853? As president of which new private university in 1891 did David Starr Jordan recruit eastern scholars to California? As president of which South American country from 1908 to 1935 did General Juan Vicente Gomez grant oil concessions to… Which prime minister of Israel signed the Camp David Accords in September 1978?