An age bar for party posts and a "One Family, One Ticket" rule - with a loophole that exempts the Gandhis among others - is on the Congress agenda as it begins a three-day "Chintan Shivir" in Rajasthan's Udaipur today in the shadow of poll debacles. Four passengers were killed and at least 20 more injured when a bus they were travelling in caught fire near Katra in Jammu, said the police. The bus carrying Vaishno Devi pilgrims was on way from Katra to Jammu when it suddenly caught fire. The subject of Hindi - which is not India's national language as it is often mistaken to be - being taught in schools in South India has been an emotive one, particularly in Tamil Nadu and other top stories.