Donald Trump vetoed an Israeli plan in recent days to kill Iran's Supreme Leader Ayatollah Ali Khamenei, two U.S. officials told Reuters on Sunday.

The conflict, the most intense fighting between the two countries in decades, has been met in the United States with feelings of “frustration and helplessness,” as well as heartbreak.

In Israel, 10 people, including two children, were killed and more than 100 injured during a second night of Iranian strikes, according to Israeli authorities. Iranian media, quoting the health ministry, said 128 Iranians had been killed and around 900 injured by Israeli strikes as of midday on Saturday.

Israel faced retaliation from Iran after launching missiles against Tehran's leadership and energy infrastructure as part of "Operation Rising Lion" this weekend. Iran's military responded with a wave of missile strikes against Israel,

The Israeli military said it killed nine senior scientists and experts who played a role in Iran’s nuclear program in strikes Friday. Israel says Iran intends to build a nuclear weapon, and is quite close to being able to.

President Donald Trump vetoed an Israeli plan in recent days to kill the Iran's Supreme Leader Ayatollah Ali Khamenei, two U.S. officials told Reuters on Sunday.

In many ways, it’s conceivable that Israel's Operation Rising Lion will alter the military balance of power in the Middle East more so than the 1991 Persian Gulf War.