 BUT CBS'S NICOLE SKANGA SAYS HIS SECURITY HAS BEEN PRETTY TIGHT. FORMER PRESIDENT TRUMP'S DETAIL GREW BACK IN JUNE. HE WAS GIVEN ADDITIONAL COUNTER SNIPER TEAMS. CERTAINLY NOW, DESPITE THE TRAGEDY OF YESTERDAY, SOME RELIEF THAT THERE WERE FOUR TEAMS AT THAT EVENT. SECURITY NOW BUMPED UP EVEN MORE IN MILWAUKEE. THE HEAD OF THE FBI CALLING IT THE HIGHEST LEVEL THREAT SINCE 9-11. CBS NEWS SPECIAL REPORT. I'M MONICA.