It's time now for Ask An Expert. Every weekday at 9:20 AM on KCBS, we're giving you direct access to top experts in various fields. Secretary of Defense Pete Hegseth is reportedly considering bringing back a controversial practice to Army boot camp known as a "shark attack." To answer those questions and more, KCBS Radio news anchor Eric Thomas spoke with Brendan Kearney, a colonel in the United States Marine Corps who spent 31 years on active duty before retiring.