Obama's Next Big Challenges: Afghanistan and Pakistan  The
president will address concerns about the Taliban in a meeting
with Zardari and Karzai.  As he basks in the glow of the
favorable reviews of his first 100 days, President Obama faces
two looming crises that jeopardize the outlook for his next 100
days—Afghanistan and Pakistan. Obama acknowledged the twin
challenges at a town meeting in Arnold, Mo., last week. "In
Afghanistan and neighboring Pakistan, we do have real problems
with the Taliban and al Qaeda," he said. "They are the single
most direct threat to our national security interests." He will
address these concerns today and tomorrow when he hosts Pakistan
President Asif Ali Zardari and Afghanistan President Hamid
Karzai at the White House.The weak government of Pakistan is
having enormous difficulty pushing back against increasingly
aggressive Taliban insurgents on its own territory. Obama told a
news conference Wednesday night that he was "gravely concerned"
about the situation in Pakistan and