Obama's EPA Administrator announces resignation
The Obama administration's chief environmental watchdog announced Thursday that she was stepping down after a tenure that began with high hopes for big changes but ended with no system to regulate global warming pollution and an unfinished agenda.


EPA Administrator Lisa Jackson (50), the agency's first black administrator, constantly found herself caught between Obama administration pledges to solve thorny environmental problems and steady resistance from Republicans and industrial groups who complained that the agency's rules destroyed jobs and made it harder for American companies to compete internationally. (AP)