Pro-animal duo busted in terror siege by Jessica Heslam Tuesday, August 20, 2002 A violent international animal activist group launched a siege of terror on a Back Bay father and other employees of a Hub insurance firm they claim has ties to a controversial British lab that does animal testing, authorities said yesterday. ``It throws your life upside down,'' said one frightened victim who spoke anonymously for fear of retaliation. Two local members of the radical group were arrested Saturday after a four-month ``campaign of fear and intimidation'' on Robert Harper Jr., a mid-level manager at Marsh, a worldwide insurance...