NEW : ' This cause is just , ' French President Sarkozy says . NEW : Sarkozy to travel to Afghanistan Tuesday night . NEW : France will send a team of experts to Kabul next week for talks with the Taliban on ending violence in their country. 10 French soldiers killed as fighting flares around holiday .
NEW : 'This cause is just , ' French President Sarkozy says . NEW : Sarkozy to travel to Afghanistan Tuesday night . NEW : Officials dismiss Taliban claim of 15 suicide bombers entering base . 10 French soldiers killed as fighting flares around holiday .