Secretary of State Rice arrives in London Wednesday to address tensions among key allies.
A surge by the US and its allies is needed in the country.
The apparent death of Abu Laith al-Libi shows gains by US intelligence in Waziristan.
Foreign Relations Committee hearing comes a day after the release of two critical reports.
US, Pakistan step up efforts to address the militant haven tied to global terror.
Attacks aren't just a US concern, more Pakistanis say.