NASCAR world pays an emotional tribute to Kyle Busch before Coca-Cola 600

CONCORD, N.C. — NASCAR paid tribute to Kyle Busch on Sunday, in a poignant ceremony before the Coca-Cola 600 that moved many of those who competed against the two-time Cup Series champion to tears. At the conclusion of pre-race festivities, a gathering that included Busch’s wife, Samantha; his two…