Radio masts and towers Radio masts and towers Radio masts and towers are, typically, tall structures designed to support antennas (also known as aerials) for telecommunications and broadcasting, including television. There are two main types: guyed and self-supporting structures. They are among the tallest man-made structures. Masts are often named after the broadcasting organizations that originally built them or currently use them. In the case of a mast radiator or radiating tower, the whole mast or tower is itself the transmitting antenna. The terms "mast" and "tower" are often used interchangeably. However, in structural engineering terms, a tower is a self-supporting or cantilevered structure,
How Does She Do It? How Does She Do It? "How Does She Do It?" is the fourth episode in the first season of the CBS television series "Supergirl", which aired on November 23, 2015. It was written by Yahlin Chang and Ted Sullivan, and directed by Thor Freudenthal. The episode centers on Kara dealing with babysitting Cat Grant's son while on vacation while tackling a series of attempted bombings that threatens National City. As Supergirl flies around National City, she destroys a drone that was following her. She suspects Hank is watching her, but he denies it and Alex, believing him, tells Kara to