During 1816-1824, the US governement enacted some tariffs at a high rate. This tariffs were widely rejected by some prominent figures like Andrew Jackson, Francis Preston Blair and others.
A prominent man who defended the tariffs, which were enacted with a protectionsist purpose, was John Calhoun. The states and representatives against the tariffs claimed a Nullification over the tariffs as they considered them anti-constitutional. This was known as the Nullification Crisis.
5G is a fifth generation wireless connection designed to better speed up of wireless connection especially in telecommunication sector. This technology makes it easier for remote execution due to the fact is has much higher data rate.