Here are the top five things to know this Tuesday morning: At least 22 people – including children – are dead after an explosion at a concert in Manchester, England; a new study raises questions about the effectiveness of steroid injections in combating arthritis in knees; experts speak out about the sea lion and the little girl in Steveston, B.C.; treasure hunters dig up incredible relics from the River Thames; and a remarkable squadron of pilots raise awareness about aviators' role in the First World War.
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1. Manchester attack: At least 22 people were killed after a suicide bomber targeted an Ariana Grande concert in Manchester on Monday night. Attendees are speaking out about the horrific sights they saw, as officials from around the globe – including Canada -- pledged support for the United Kingdom.
2. Steroid injections: A new study is raising questions about the effectiveness of steroid injections for patients suffering from arthritis in their knees. The study found that giving patients cortisone injections every three months was no better than giving them a placebo.
3. Sea lion: Experts are speaking out about an unidentified girl who was dragged into the water by a sea lion in Richmond, B.C., advising the child’s parents to take her to hospital to be checked for a possibly serious infection.
4. Mudlarking around: Treasure-hunters are turning up centuries-old relics along the shores of the River Thames in London, ranging from Roman relics to the remains of pre-historic rhinos and sharks. The activity is called mudlarking and the activity is luring history buffs to the river's banks.
5. Coast-to-coast: A squadron of replica bi-planes aim to fly coast-to-coast, in an effort to raise awareness about aviators' role in the First World War. Ten pilots will fly four reproduction Nieuport 11 fighters in a journey that is expected to take six months.
