Authorities in Florida arrested 22-year-old Garrett Smith Thursday morning after finding him with a homemade explosive device at a rally in support of a suspect in the January 6 Capitol riot, police said. Describing Smith as a "sleeper," Pinellas County Sheriff Bob Gualtieri said the incident is particularly worrisome. Detectives said they don't know what Smith intended to do with the explosives. He has no criminal history, there is no intelligence from other agencies and he has no social media... ...He was wearing "all black clothing, a face covering, and carrying a black backpack," according to the sheriff's office... ..Gualtieri...