The United States on Thursday began enforcing new visa rules on some travelers who have visited or who have dual nationality with states considered seedbeds of terrorism, AFP reports. The Department of Homeland Security said would-be visitors to the United States who have been to Iran, Iraq, Sudan or Syria since March 2011 will now always have to apply for a visa. This will be the case even if the traveler is from a country in the U.S. visa waiver program -- the 40 nations seen as friends of America whose citizens can visit freely. .....