President Barack Obama has pitched for $83.4 billion for military operations to 'disrupt, dismantle and defeat' Al-Qaeda and Taliban threatening the US from their safe havens along the Pak-Afghan border, asking lawmakers to urgently approve his 'last' supplemental funds to fight terrorism.

"We face a security situation in Afghanistan and Pakistan that demands urgent attention. The Taliban is resurgent and Al-Qaeda threatens America from its safe haven along the Afghan-Pakistan border," Obama wrote in a letter to Nancy Pelosi, Speaker of the House of Representatives, seeking early approval for his war supplemental request of $83.4 billion.