 This announcement today of warplanes comes just days after a series of deadly Russian attacks on Ukraine, including on a children's hospital, and overall more than 40 people were killed. How much of a difference can the provision of these jets make? Well, President Zelensky has said in the past that they needed around 130 to be on a par with Russia, but so far the Allies have pledged fewer than 100, and not all of them will arrive at the same time.