We will all remember where we were when the twin towers were attacked on September 11th 2001.
Those of us old enough to recall it have another tragic date and place indelibly fixed in our minds. The 22nd November 1963. 40 years ago this week. It was the day on which President Kennedy was shot in Dallas.
Two Irish sisters Claire and Mairead O'Connor became fascinated by JFK after he toured the Republic months before he died. It remained a lifelong ambition to do a tour of his holiday home in New England, the Kennedy Museum and the Arlington cemetery in Washington where he's buried.
Mary Harte met them as they began their trip in Boston.