Security expected to be tighter as Americans head off on Thanksgiving travel

By Kylie Gumpert NEW YORK (Reuters) - Millions of Americans embarked on their annual Thanksgiving travels on Wednesday, with security at airports, New York City's parade festivities and other venues expected to be heightened amid jitters after the Paris attacks. The FBI sent a bulletin earlier this week to police departments across the country warning of possible copycat incidents and sharing intelligence on how the assailants in Paris carried out attacks on Nov. 13 that killed 130 people. The U