bill nealy, nbc news, sicily. >>> the scene at the national arboretum in washington, as a second bald eagle emerged from its shell. moment captured on live video stream. the parents known as the president and the first lady. one of them was seen feeding the new arrival that came after a first eagle hatched friday. >>> think about the sun. now imagine a group of stars at least 100 times more massive. an international team of scientists say they have identified a cluster of stars. nine of them using nasa's hubble space telescope. needless to say the monster cluster known as r-136. nasa says they're also far brighter than the sun. >>> and two emerald green comets are expected to make relatively close encounters with our planet. the first will fly within 3.3 million miles of earth tomorrow morning. the second will be just 2.2 million miles away on tuesday. while that may seem still far off, we are told it will be the closest a comet has come to our world since 1770. >>> pope francis celebrated palm sunday mass today before tens of thousands in st. peter's square. he highlighted the plight

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bill nealy is following the developments for us. let's talk about the protests.stand there have been arrests. >> good afternoon, alex from i windy, rainy brussels. it's not just the weather that was ugh leechlt there were ugly scenes in the square behind me about four hours ago. a crowd of about 400 mostly young men dressed in black descended on this square in what they called was an anti-isis demonstration. they are from a right wing group and against immigrants. they began chanting some right wing fascist slowingance. we are the people, this is our home and the state is an isis accomplice. they made gestures and threatening phrases towards the muslims who were gathered here as part of a large crowd. the crowd began chanting back and they are saying we are all the children of immigrants. riot police began to move in and riot shields and corralling the young guys. and pushing them back from the square. eventually two vehicles were brought in and water can ons were used against this group of people. it lasted an hour and we don't want to exaggerate what happened,