Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: In our series of letters from Africa, Joseph Warungu senses a new wind blowing across Kenya following the attack by Somalia-based al-Shabab militants on Garissa university earlier this month.

Garissa attack: How it has changed Kenya