Trump Issues Warning as US and Iran Trade Strikes. What You Need to Know - July 21

The U.S. and Iran continue to exchange strikes, as dramatic video appears to show a massive explosion late last week with two U.S. servicemembers killed and a third presumed dead; Tropical Storm Bertha is set to make landfall in Texas later this week while millions in the heartland and on the East Coast could see severe storms and flash floods today; Michigan reporting 400 new cases of cyclosporiasis since yesterday following a false positive on lettuce from a Taylor Farms location; a fourth person has died in connection with an outbreak of Legionnaires' disease in Manhattan; two American tourists stabbed at the acropolis in Greece; CVS says you can now fill common pet prescriptions at over 9,000 of its locations nationwide; new details on the funeral for the late Sen. Lindsey Graham; and an update on Jackie the eagle, who was rescued by California firefighters.