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Republican Senator Susan Collins of Maine joins Jake Tapper to discuss the suspected chemical attack in Syria and what tariffs may mean for her constituents.

Several Syrian activist groups on Saturday reported that a brutal attack on the remnants of the rebel-held city of Douma in Eastern Ghouta left dozens of civilians killed and scores wounded.

Several people were killed and others wounded when a bus carrying a junior league hockey team crashed with a tractor-trailer Friday in western Canada, police said.

Once again, a driver has plowed into a crowd, turning a vehicle into a lethal weapon. This time, it was in Muenster, Germany, where police said several people were killed and at least a dozen seriously injured Saturday after a delivery truck slammed into people.

Police in Canada say 14 people are dead after a bus carrying the Humboldt Broncos hockey team collided with a semitrailer.

Former Russian spy Sergei Skripal is "improving rapidly" and is "no longer in a critical condition" following a nerve agent attack in Salisbury last month, the hospital treating him said in a statement on Friday.

Throwing insults and bizarre accusations has become a normal way for Russia to respond when its own appalling behavior comes to light.

Read CNN's Human Spaceflight Fast Facts and learn more information about manned spaceflight programs in the United States and around the world.

China and Russia are publicly heralding a new age of diplomacy between the two countries, at a time when both are being targeted by the United States with punitive measures.

A record-breaking discovery. An important anniversary. Another shooting. What do you remember from the week that was?

Russia, at a United Nations Security Council meeting, warned the British government Thursday it was "playing with fire" with accusations that Moscow was behind the poisoning of a Russian former spy and his daughter in the United Kingdom.

Russia is pushing back against U.K. claims that Putin and the Kremlin were behind the poisoning of an ex-Russian spy on British soil.

Read CNN's Fast Facts about Lent, a season of prayer and penance in the Christian church and a period of preparation for the Easter season.

2010 CNN Hero Magnus MacFarlane-Barrow's nonprofit, Mary's Meals, has given more than one billion free, nutritious meals to schoolchildren around the world. Anderson Cooper reports.