Islamabad, Pakistan (CNN) -- The 24-year-old son of the late Benazir Bhutto, groomed to take the reins of power in Pakistan, came of age politically Thursday, exactly five years after the assassination of his mother. Bilawal Bhutto-Zardari flexed his tender political muscles at a rally with his father, Pakistani President Asif Ali Zardari, near the family home in Sindh province ahead of next year's elections. He delivered a political stump speech acknowledging problems in Pakistan, such as the devastation caused by floods. He also slammed the terror that led to his mother's killing and asked why there have been no convictions for the crime.
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NEW: Kill a Bhutto and another will emerge, the young Bhutto-Zardari said
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NEW: Pakistani President Asif Zardari says his son's training has begun
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Benazir Bhutto was killed five years ago in a gun-suicide bomb attack
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Thousands gathered near the home to mark the fifth anniversary of her death
He told the crowd that @placeholder's "education is finished, and his training has begun."