`` Verás Dolor '' and `` Y Aquí Me Ves De Pie '' prove that the singer 's emotional delivery is better than ever .

In a third series with a single test Testing , known as Grapple Y , in April 1958 , another design was tested Testing .

The design of Grapple Y was notably successful because much of its yield came from its thermonuclear reaction instead of fission of a heavy uranium-238 tamper , making it Causation a true hydrogen bomb Attack , and because its yield had been closely predicted—indicating that its designers understood Know what they were doing .