Can a hawk kill a person or medium sized dog?

Yesterday I was walking with a friend and my dog and this hawk circled us over head. The massive bird swooped down and came only a few feet away from us. Telephone wires got in it’s way but who knows what it was going to try if it wasn’t in the way! It was amazing, beautiful, and majestic. Now I wonder though if it had tried something could it kill a a person or a medium sized dog?