Because the rate of tumors is higher than we would expect in the general population. reporter: the mayor says the school will remain open, and any changes will hinge on the samples that are being collected. the results are expected within the next month. zachary, thank you. for the first time since the pandemic, pope francis is celebrating easter mass in a crowded st. peter s square, on what he called an easter of war. the pope delivered a message to the world requesting prayers for peace in ukraine. saying we ve seen too much blood and too much violence. he addressed a crowd of about 100,000 people. and still ahead on world news tonight this sunday, how that massive container ship finally came free. and the emotional reunion of a pilot and the officers who saved his life.
Tresemme. do it with style. well, pope francis is celebrating easter sunday mass at the crowded st. peters square right now. now, for christians it s a joyous occasion. it s the holiest day of the cathlen calender and commemorates jesus resurrection after crucifixion. joining me now from rome is cnn s john allen. john, bring us to speed on what the pope has been saying in what must be a bittersweet easter celebration. reporter: hi, kim. happy easter to you. yes, clearly the war in ukraine has cast a shadow over this easter celebration.