Envoys from the Soviet Union and Turkey are due in Iran, apparently to talk with the leadership there about possible diplomatic moves to end the war. Iran's efforts to orchestrate a diplomatic solution so far have drawn a cool response from the United States. Diplomats in Tehran said Iran believes that only military pressure can persuade Iraq to withdraw from Kuwait and accept a settlement.

Iraq has halted all domestic sales of gasoline, heating oil and natural gas as a result of bombing damage. The restrictions are expected to further curtail commercial activity and limit the attempts by the population to flee the bombing raids.

There is growing military and political pressure in Israel to respond militarily to Iraq's Scud missile attacks on Israeli cities, and Israeli Prime Minister Yitzhak Shamir has drawn his own line in the sand. In a letter to President Bush leaked in Israel, Shamir said a chemical attack or one causing heavy Israeli casualties would trigger a response.

The air war in the Persian Gulf can involve blanketing the same target with dozens of bombs, one of the reasons for the vast number of allied sorties against targets in Kuwait and Iraq. Selecting the targets and matching the weapons used against them is a complicated job done with the help of computers capable of adjusting to the constantly changing variables of war operations.