Tribesmen in Yemen say this is wreckage from a fighter jet they shot down north of the capital. They also say the've captured the pilot.br Yemeni television blames the downed plane on Islamist militantsbr On the streets of Sanaa, thousands called for President Ali Abdullah Saleh to be tried in court.br Saleh's return to the country has prompted an escalation in violence against anti-government protesters.br Yemen is still reeling from a week of shelling and shooting which killed more than 100 people.br Deborah Gembara, Reuters.