1. The knifeman is described as white, aged in his late 20s or early 30s, of medium build with silver studs across his top lip.
- Athletes probably won't break records at the Rio Olympics. In most events, top performers have already reached the limits of human biology, scientists say.
- Some Bernie-or-Busters protested Hillary Clinton's DNC speech, but a tightly organized plan — from chants to secret allies — kept heckling off TV.
- Sixteen people have died after a hot air balloon crashed in Texas.