Today 8a: Johnny Depp defamation trial. Allyson Felix opens up in first interview since retirement. How to avoid scams with app payments.

<p>Johnny Depp takes the stand in defamation trial against his ex-wife, actress Amber Heard. Plus, Olympic champion Allyson Felix joins Savannah Guthrie and Hoda Kotb for an exclusive interview – her first since announcing retirement from running. And, TODAY’s Consumer – tips on how to avoid scams when paying through an app.</p>