Questions....

Hey guys, I have two questions...
1) I heard that, “according to the dc laws”, none of the buildings in dc can not be taller than monument?

2) Because of the fact that the number “13” is known as an unlucky number, it does not even exist in some elevators? In other words, it follows like 11, 12, 14, 15…

Is that really true? I knew that it is known as an unlucky number but I did not know that people were taking that serious…