- Congress starts at 9 a.m. Friday in a Pyongyang convention center called "April 25 House of Culture"
- North Koreans work grueling hours to prepare capital for highly anticipated 7th Congress
Pyongyang, North Korea (CNN)The sound of loudspeakers blaring at 6 a.m. is something I've come to expect when traveling to the North Korean capital. The citywide alarm signals the beginning of each new workday. But on this particular morning, the wake-up call went off an hour earlier -- at 5.