Instructions: In this task, you are given a piece of an article. Your task is to generate a short summary of the text. Try to give the summary in just one sentence.
Input: Google Monday said it agreed to buy Titan Aerospace, a startup that is building drones it hopes will fly for years using the power of the sun. Facebook was in talks with the firm earlier this year, but ended up buying another startup in the same field, called Ascenta.
Output:
The police foiled students ' plan to stage and block road.