Spy Times Some notable American turncoats  by Gerry Brown and
Beth Rowen  Source: AP/Wide World Photos Ethel Rosenberg, 35,
and her husband, Julius, 34, ride to separate jails in on New
York City March 29, 1951 following their conviction as traitors
in the nation's first atomic espionage trial. Spies. Nuclear
warheads. Submarine technology. Stolen documents that could
threaten national security.  Countries have been spying on each
other as long as there have been countries. Recently, the U.S.
spy plane that crashed in China made headlines. When countries
get their hands caught in the proverbial cookie jar, denial and
feigned shock are the official reactions.  Here's a quick
history of some other famous spies.  Benedict Arnold  Every
schoolchild knows that Arnold is the textbook definition of a
traitor. The bright and talented Revolutionary War brigadier
general won several battles for the colonies including some
naval clashes with the British on Lake Champlain before becoming
a turncoat.  Still, he was passed