"Like every nation in the world, Israel has the right to respond — indeed has a duty to respond — to these vicious attacks," Biden said at the White House.
The group, founded in 1987, has vowed to annihilate Israel. Before this past weekend's attack, it was responsible for many suicide bombings and other deadly attacks on civilians and Israeli soldiers.
The Israeli military said it has largely regained control of areas in the south that had been attacked by militants from Hamas. The announcement came on the fourth day of war with Hamas.
Sen. Cory Booker and Rep. Dan Goldman are back in the U.S. after sheltering in place as violence erupted in Israel on Saturday. Flight disruptions have left other U.S. citizens unable to get home.
Most Gazans support resistance against Israel and Hamas and Islamic Jihad still do have a following, though some Gazans are frustrated with the groups. Analysts see a rift forming between them.
The Gaza Strip needs major reconstruction after the Israeli military hit buildings and infrastructure. Experts say the U.N.-backed process of vetting projects ends up increasing costs and delays.
Many stayed in constant touch with their loved ones during the hostilities. And despite the ceasefire, their fears and feelings about a conflict thousands of miles away are still raw.
The fighting between Israel and Hamas is straining U.S. interfaith groups, even during the cease-fire. They've lost some members because of the pressure. But others are forging ahead.
Fully intact buildings stood right next to where others had been flattened. Families walked together in the streets, dressed-up in fancy clothes to visit relatives for Eid.
After 11 days of the worst fighting in the region since 2014, global leaders called for both sides to resolve the long-standing conflict to achieve lasting peace.
As Israel's military strikes Gaza, Palestinian families across the territory huddle in their buildings' stairwells or rooms that put the most walls between them and the offensive outside.
