Soccer-Gabon in peril after second draw, Cameroon fight back (Reuters)

* Gabon in danger after two draws* Cameroon fight back to avoid shock defeat by Guinea BissauBy Mark GleesonLIBREVILLE, Jan 18 (Reuters) - Hosts Gabon were on the brink of elimination from the African Nations Cup after a second successive draw on Wednesday left them needing a result from their last game against Cameroon.Pierre-Emerick Aubameyang scored again for Gabon but his first-half penalty only equalised against Burkina Faso in another 1-1 draw for the home team.