Trevor Ault reports on the chemical tank rupture at a paper mill in Washington state, killing at least one person and leaving multiple critically injured, authorities said; Gio Benitez has details on the pilot on a Delta connection flight, operated by Endeavor, declaring an in-flight medical emergency after his first-officer briefly lost consciousness; Faith Abubey has the latest on the growing Ebola outbreak as the CDC sends an "urgent request" to staff for help screening Americans returning from central Africa for potential signs of the virus; and more on tonight’s broadcast of World News Tonight with David Muir.
00:00 Intro
02:32 At least 1 dead, 9 missing after chemical tank ruptures in Washington state
05:11 Pilot declares medical emergency during landing after copilot passes out
06:01Tracking flood threats from Texas to the Southeast
07:14 Deadly home explosion in Michigan was murder-suicide attempt, investigators say
08:56 Trump says medical evaluation "checked out perfectly" amid Iran tensions
11:16 CDC seeking volunteers to help screen travelers at U.S. airports for Ebola
13:16 AP projects Texas Attorney General Ken Paxton to win Republican Senate Primary runoff
14:19 New York Knicks head to the NBA Finals for first time in 27 years
15:46 Utah authorities urgently search for toddlers possibly abducted by their father
16:05 Video shows bounce house fly across yard during strong winds in Florida
16:17 South Carolina woman killed by umbrella while dining at restaurant, coroner says
16:33 Texas teen hospitalized after shark bite
17:03 NASA announces next steps in plan for building moon base
17:18 Nearly 90 drones veer off course during Sydney Harbor show
17:32 Jazz legend Sonny Rollins dies at age 95
17:59 America Strong: Crowd at University of Oklahoma helps boy singing National Anthem at softball game
ABC World News Tonight with David Muir delivers the news that matters most. Watch to get the latest news stories and headlines from around the world.

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