Pizza Hut offering half a million free pizzas to 2020 grads

Pizza Hut is celebrating the class of 2020 with free pizza. 
The company posted on Twitter that it's giving away half a million medium one-topping pizzas.
 The company says the pizzas can be claimed on their website.  Once there, people can sign up for a Hut Rewards account and receive a coupon.
The offer ends Thursday, but coupons can be redeemed through June 4.