WASHINGTON (Agencies) - Top US commander General David Petraeus and Undersecretary of Defense for Policy Michelle Flournoy called on Pakistan on Tuesday to do more to contain insurgents along the volatile border region. In terms of cooperation from Pakistan in the fight against the Taliban and Al-Qeada, Petraeus said he sees progress. There is a growing recognition in Pakistan that allowing terrorists and other insurgents to have safe haven on its side of the border will eventually hurt Islamabad, Petraeus told US lawmakers. There is a growing recognition [in Pakistan], that you cannot have poisonous snakes in your backyard even if they just bite the neighbours kids because at some point, they will turn around and bite you. Michle A. Flournoy, Undersecretary of Defense for Policy, said US forces are having extremely candid conversations about what we would like our Pakistani partners to do in terms of pressuring Al-Qaeda senior leadership in the border regions. He said the US was seeing evidence of Irans influence in the region. He said there is evidence Iran is shipping weapons to the Taliban and is using other political means to influence the region. Petraeus testimony comes one day after he briefed US President Barack Obama and Defense Secretary Robert Gates on the situation in Afghanistan. Petraeus urged the American people to remember the reasons why US forces continue to fight in Afghanistan in the face of a new poll showing the lowest level of American support for the longest war in US history. Petraeus said he understands the level of American frustration with the Afghan war, but warned of the growth of Qaeda in the country and region if the US abandons its mission and allows the Taliban to regain control. I think its important to remember why we are there. Thats where 9/11 began - thats where the plan was made, he said. We do see Al Qaeda looking for sanctuaries all the time. He said coalition forces had halted the march of Taliban militants in parts of Afghanistan, but he warned that their fragile success could still be undone. The momentum achieved by the Taliban in Afghanistan since 2005 has been arrested in much of the country and reversed in a number of important areas, he said. Petraeus said progress has been achieved since President US Barack Obama poured thousands of reinforcements into the country in late 2009 to thwart the Taliban insurgency. The progress made in the past months means the coalition would in the coming months begin transferring responsibility for security to Afghan forces in many provinces, Petraeus said. It would also help frame his recommendation for commencement of the drawdown of the US surge forces in July. The hard-fought achievements in 2010 and early 2011 have enabled the Joint Afghan-NATO Transition Board to recommend initiation this spring of transition to Afghan lead in several provinces, Petraeus said. However, while the security progress achieved over the past year is significant, it is also fragile and reversible, he warned. Petraeus said he was optimistic about the course of the fight going forward, after the coalitions recent military successes.