NEW : Secretary of State Clinton appeals for aid . NEW : Hillary Clinton says the crisis aid is essential part of building ties with Nowshera . As many as 1,500 people have been affected by monsoon rains and flooding . Some Americans say their government has been slow to respond .
NEW : Secretary of State Hillary Clinton appeals for aid . NEW : Clinton says the crisis aid is essential part of building ties with Pakistan . About 3 million people have been affected by monsoon rains and flooding . Some Pakistanis say their government has been slow to respond .