U.S. hikers in Iran
Two remaining U.S. hikers released from Iranian prison arrive in New York.
Shane Bauer and Josh Fattal have been in an Iranian prison since July 2009
American Hikers Shane Bauer, Sarah Shourd and Josh Fattal.
Experts speculate Iran is using hikers as bargaining tools.
Iran still persecutes those with Western contact.
One of three American hikers imprisoned in Iran for more than a year on espionage charges has been released.