Hi everyone
This is my first post here, so I think this question has been made a thounsand times before (sorry about it).
I'm from Chile, and I'm very very interested on planning some kind of meeting between people here to talk via radio at ISS.

Well, i have some doubts about this, specially because i'm not even amateur on Radios but I'm expecting to do this with local amateur radio club.

They have the right equipment to have a contact with ISS, but I don't know if it's as easier as simply get tuned on frequency and begin to talk or do I need something else?
I have been reading about QSL but 1) Don't know exactly what they are and 2) don't know exactly where to get one.

The orbiter touched down at the Kennedy Space Center in Florida at 1314 GMT.

Mission control had raised concerns about weather conditions, but gave the go-ahead shortly before the ship began its hour-long descent.

Nasa hopes the mission's success has drawn a line under doubts over the shuttle programme's safety.

"Welcome back Discovery and congratulations on a great mission," mission control told shuttle commander Steven Lindsey, as the orbiter came to a halt on the runway after deploying its parachute.

"It was a great mission. A really great mission," Lindsey replied.

Discovery was cleared for re-entry over the weekend when inspections revealed no signs of damage to the craft.