Thousands mourn in Pakistan a year after Bhutto's killing

she was killed in a gun and bomb attack in the Rawalpindi city as she emerged from an election rally just over two months after she had returned from years of self-exile.
 
In February, the two-time prime minister's Pakistan People's Party rode a wave of sympathy to win an election and it now heads a coalition government. Her widower, Asif Ali Zardari, has become president. 

Zardari, in a statement marking the anniversary, said the attack on his wife was an attack on the viability of state and aimed at undermining efforts to build democratic structures and to fighting militancy.
"The tyrants and the killers have killed her but they shall never be able to kill her ideas that drove and inspired a generation to lofty aims," Zardari said. 

Tension has been rising with India over last month's militant attacks in the Indian city of Mumbai, raising fears of conflict between the nuclear-armed neighbors. 

A year after her murder, many questions remain unanswered.
Investigations by Pakistan's previous government, British police and the U.S. Central Intelligence Agency accused an al Qaeda-linked militant of killing Bhutto, a staunch supporter of the U.S.-led campaign against militancy. 

But many of Bhutto's supporters have expressed dissatisfaction over those investigations.