Tonight on Special Report with Brit Hume:

U.S. troops are cracking down in Iraq. They're trying to track down and kill or arrest enemy fighters behind the recent attacks on U.S. soldiers. Senior defense officials say more combat operations ar expected..

Plus:

Israeli helicopter gunships firedthree missiles at a car in Gaza City, killing a Hamas militant riding inside.

Israel has decided to target top Hamas (search) leaders, including founder Sheik Ahmed Yassin (search), confirming a policy change likely to speed up an attack-revenge cycle that has already claimed 46 lives in four days.

Sen. John Kerry (search), D-Mass., is calling for tougher fuel efficiency standards coupled with aid to the auto industry, and a new environmental fund to pay for research on expanding the use of alternative fuels.

On a party-line vote, the House passes a Republican-drafted tax cut measure that costs considerably more than a companion Senate bill and reduces the chances low-income families will get a child tax credit (search) this summer.

Details on those stories and more on Special Report with Brit Hume.

— Guests and topics are subject to change