by Patricia Sellers
I’m at Fortune Brainstorm Tech in Aspen. Stretching my brain. Today I hosted a Most Powerful Women lunch, where I interviewed Juniper Networks (JNPR) CEO Kevin Johnson and two of his senior execs, EVP Gerri Elliott and chief marketing officer Lauren Flaherty. Silicon Valley-based Juniper has women in 38% of its most senior jobs. That’s three times the average in corporate America. Johnson dished out advice, while and a group that included Google’s (