Tom Guerra is an American rock guitarist who’s collaborated with the likes of the Yardbirds, Max Weinberg and Johnny Winter, and he’s the co-founder of the New England classic rock band, Mambo Sons. In the world of here-today-gone-tomorrow, Tom’s dedication to music has yielded four decades of rock ‘n’ roll… with no end in sight. American Spark correspondent Carol Vassar talks with Tom about his work and latest project, American Garden…