American History X

The image on the right hand side refers to an important event in American history. What does it refer to?

Fake coins

Suppose you have five bags filled with the same type of coins and a weigthing machine. One of this bags is completely filled with fake coins, the other bags contain only real ones. A real coin weights 10 gram and a fake one 11 gram. What is the minimal number of times you need to use the weighting machine in order to find the bag with the fake coins?

The fishing fathers

Two fathers and two of their suns are going to fish. In total they catch three fishes. All of them take one complete fish at home. How is this possible?