The seminar will provide an introduction to the Project Loon, a network of balloons designed by Google to extend Internet connectivity to people in rural and remote areas worldwide. We will review its main technical characteristics and how it has evolved in the last couple of years. It will also review the activities carried out in cooperation with Telefónica in Latam, including technical trials in Chile and Perú, and provide an assessment of the main issues the project faces to become a sustainable commercial system. Although not likely to be covered in the seminar, we will also provide some information about other alternatives to provide connectivitivy using aerial networks, like Facebook Aquila initiative.