 ABC's Rachel Scott at the convention, growing calls for the head of the Secret Service to step down following the attempted assassination of Donald Trump in Pennsylvania over the weekend. This is ABC News. More tensions over the Korean border. North Korea apparently floating, what, maybe more trash-filled balloons over the DMZ. The balloons spotted north of Seoul about an hour's drive from the border. Last night was a record-breaking night for one young soccer star. Here's ABC's Darrell Binger.