"It was amazing, it was very energetic, like the energy in the room was incredible," a supporter tells AFP at the end of Kamala Harris and Tim Walz's first joint meeting in Philadelphia. "I'm so excited to be here and to hear her talking about a positive vision for the future (...) I'm really excited, it's very hopeful," another supporter says. [COMPLETES VIDI36BN9VA_EN, VIDI36BN978_EN] IMAGES AND SOUNDBITES