Can't I just buy a radio and start talking?

Yes, you really need to be licensed. First, operating high power radio equipment poses certain safety hazards and the licensing process ensures that you know something about radio frequency safety. Second, a transmitter operator needs to know how not to interfere with other users; how to locate and make contact with other users at the appropriate times; and how to adjust and operate the equipment. Third, turning on a radio transmitter is roughly equivalent to turning on a flashlight in a dark room - in other words, you are easy to find. If you operate without a license, you will be caught. This can result in large fines (such as $10,000), jail time and confiscation of your radio equipment. In short, get a license.