How to improve reception
 

I'm trying to get the Coast to Coast show, but because I'm in a highrise
surrounded by concrete, I get no AM reception. I just get static and a hum. Can
an antenna be hooked up to the radio that would end outside my window to pick
up the signal? There is also a building on one side, but it is clear for quite
a bit outside my window. Can anyone please help? Please also e-mail, if kind
enough to respond. Thanks!