The windows at airport control towers are slightly sloped inwards towards the bottom of the tower. Explain.

Explanation

### Step-by-Step Solution:

1. **Observation of Airport Control Tower Windows**:
The windows at airport control towers are designed to be slightly sloped inwards towards the bottom. This design choice is not arbitrary but serves a specific purpose.

2. **Understanding Glare**:
When sitting in front of a glass window, one can often see their reflection or experience glare, especially if there are screens (like computer monitors) present. Glare can obstruct the view and hinder the performance of air traffic controllers who need to monitor screens closely.

...