At some point in the early stages of an artist’s career, there’s inevitably that defining moment—an ultimate test of one’s fortitude and willingness to gamble on a dream—that either sends said artist back to their day job, dejected, or provides the final mental push needed to become something greater…something glorious. For UK-born singer-songwriter Callaghan, that all-or-nothing proposition was manifested at 35,000 feet, in a flight across the Atlantic Ocean.