Clever Cockatoos: The Unexpected Intelligence of Australia's Birds

<p>Fires burning across&nbsp;Canada continue to force people out of their homes.&nbsp;&nbsp;</p><p>Russia pummels Kharkiv, Ukraine's second largest city, in overnight attack that kills three.&nbsp;&nbsp;</p><p>Ottawa's move to eliminate internal trade barriers leaves the heavy lifting to provinces.&nbsp;</p><p>Researchers say Australia's iconic sulphur-crested cockatoos are more intelligent that previously thought.</p>