Defense secretary finds not enough forces in Afghanistan to protect U.S. troops . Plan could send nearly 3,000 troops , source says . Comment: Troops killed by roadside bombs up more than 400 percent in 2 years .
Defense secretary finds not enough forces in Afghanistan to protect U.S. troops . Plan could send nearly 3,000 troops , source says . Congressional Democrats have spoken against troop increases . Troops killed by roadside bombs up more than 400 percent in 2 years .