Israeli Prime Minister Benjamin Netanyahu has said "fighting could go on for a long while" as the conflict in Gaza resumed.
He told reporters Israel would not back down saying: "This will be a continuous campaign."
Ceasefire talks in Egypt broke down on Tuesday. Since then Israel claim to have killed three of the most senior Hamas leaders.
There have been two days of quiet in Gaza. No rockets or missiles, no more destroyed houses, no more ambulance sirens screaming.
A three-year-old girl has been rescued from Gaza and brought to London for life-saving heart surgery.
A small team of NHS doctors and surgeons is travel to Gaza to set up facilities and establish how best to use specialists and equipment.