Former ambassador to Ukraine on tensions on Russian border.

Former U.S. Ambassador to Ukraine William Taylor gives insight on Vladimir Putin's perspective amid escalating tensions between Russia and Ukraine.

Watch video on channel "ABC News"
Church shooting suspect may face death penalty

Church shooting suspect may face death penalty

David Chou is accused of killing one person and wounding five others on Sunday afternoon when he targeted the Geneva Presbyterian Church in Laguna Woods, California.

Pentagon now reports about 400 UFO encounters

Pentagon now reports about 400 UFO encounters

Officials said in congressional testimony they are "reasonably" sure pyramid-shaped objects in one video were drones.

ABC News Live: Biden meets with families of victims in supermarket shooting.

ABC News Live: Biden meets with families of victims in supermarket shooting.

Plus, officials investigate the California church shooting as a hate crime, and the FDA and Abbott agree to reopen Abbott’s plant in Michigan to help ease baby formula shortage.

Progressive, moderate Democrats face off in primary elections.

Progressive, moderate Democrats face off in primary elections.

FiveThirtyEight’s senior elections analyst Nathaniel Rakich discusses the shape of the elections so far and what he is watching for in the five state races.

Biden visits Buffalo, New York, in wake of mass shooting.

Biden visits Buffalo, New York, in wake of mass shooting.

ABC News obtains a document allegedly posted online by the suspect that authorities say may indicate how he carefully planned the shooting.