ADEN (Reuters) - Ten people were wounded, one critically, in clashes between Yemeni security forces and southern separatists in Aden on Saturday, medical sources said, days after six were shot dead during protests. The separatists want political autonomy or a new state in south Yemen. It is one of three insurgencies in the strategically vital Arabian Peninsula state where Washington fears political chaos is giving al Qaeda space to operate. North and south Yemen were unified in 1990 after the Communist-led southern government collapsed. ...