The population of Puerto Rico traces its ancestry in mostly the Spanish colonists and the indigenous people of the island. They have mixed over time and gradually created a mestizo population, which became the dominant population on the island and still is. There are of course some other influences in the gene pool of the Puerto Ricans, with some of it being from the African continent because of the African slaves that were brought, but it is a small minority, and it is also a population that has been heavily mixed.
The North Vietnamese forces, especially the Viet Cong made their own explosives. They used explosives that did not explode, cut them open and made their own improvised explosives. They used traps like bamboo maces or crossbows which were activated by trip wires. One common trap was the punji stake trap. This was a bed of very sharp bamboo stakes hidden in a large hole for their enemies to fall into.
Procrastination I think possibly
Answer
Sinners must come to Christ with humble hearts and ask for Christ's forgiveness in order to be spared God's wrath. Only those people who have found Christ's salvation have a chance of avoiding hell.