Russia has hit Ukraine's second-largest city, Kharkiv, with a massive drone and bomber attack, killing four people and injuring nearly 60, officials say. Two people were also killed in Russian strikes on Kherson, in southern Ukraine, local authorities said.

The United States believes that Russian President Vladimir Putin's threatened retaliation against Ukraine over its drone attack last weekend has not happened yet in earnest and is likely to be a significant,

Its current partnership with Wing (owned by Google parent company Alphabet) offers delivery in just over a dozen stores in Bentonville, Arkansas (the home of Walmart headquarters) and Dallas, Texas.

Walmart is expanding its drone delivery service to three more states as it competes with Amazon to be the fastest delivery service.  In partnership with Google's Wing, Walmart is expanding the service to launch at 100 stores in Atlanta,

The retailer becomes the first to run drone deliveries across five US states. With the expansion, Wing's drones will take off from 100 Walmart stores.