Crack propagation in 4 × 10-in. laminated specimens of 1100 H-19 aluminum foil under uniaxial tensile loads perpendicular to the crack direction has been investigated. While the crack behavior is similar to that found in monolithic sheets the laminates exhibit a brief arresting of crack growth before onset of sudden fracture. It was further established that the Griffith-Irwin energy-dissipation rate is a constant for any particular laminate configuration.