"That's why we are now focused on our principles as we go into these negotiations, understanding what the specific interests are, meeting investors overseas, engaging with businesses here, to establish a full picture to guide those objectives in negotiations".
He said it was already an offence to go overseas to engage in terrorist activity, "but we want to make it easier to ensure that people who do go overseas and do engage in terrorist activity can be appropriately dealt with here in this country to prevent them from being a threat to our people".
"I knew it was a very big target for people overseas that engage in these activities," he said.
The woman was arrested under section five of the Terrorism Act on suspicion of preparing to travel overseas to engage in terrorist acts.
Minbar Ansar Deen - also known as Ansar al-Sharia UK - promotes terrorism by distributing content through its online forum, which encourages individuals to travel overseas to engage in extremist activity, specifically fighting, the Home Office said.
The Obama administration is to outline how it says US laws empower the government to kill Americans overseas who engage in terrorism against their home country, according to a source.
President Obama on Wednesday signed an executive order establishing the first sanctions program to allow the administration to impose penalties on individuals overseas who engage in destructive attacks or commercial espionage in cyberspace.
A 62-year-old Baltimore man was sentenced to 15 years in prison for traveling overseas to engage in illicit sex with a minor, closing one of the first cases under a 2003 law giving federal officials new powers to prosecute Americans suspected of molesting children in other countries.
Intelligence the FBI collected from confidential informants and Khan's communications with "nefarious individuals" led the bureau to believe that he was preparing to travel overseas to engage in terrorism and kill Americans.
To combat this growing problem, laws are being passed in many countries, including the United States, which make it illegal to travel overseas to engage in sexual acts with a minor.
Behavior detection officers use techniques familiar in some overseas airports, engaging passengers in casual conversation to look for suspicious behavioral clues.
