In the 1960s, as opposition to the Vietnam war intensified, a few radicals decided peaceful protest was not enough. They organized and coordinated violent acts, including bank robberies and bombings, against "the establishment." The group's name, the Weather Underground, was inspired by a line in a Bob Dylan song. Some members took on new identities and disappeared. They became adept at avoiding the authorities, in some cases for decades. But one-by-one they resurfaced to face legal charges and attempt to reconnect with lives and families they had avoided for years. Several such figures appear in Neil Gordon's new novel "The Company You Keep."