The US warned Israel on Tuesday that it could withhold some of its billions of dollars in military assistance unless it improves aid delivery to the war-battered Gaza Strip within 30 days. The warning comes a year into the Israel-Hamas war in which President Joe Biden has repeatedly pleaded with Israel to spare Palestinian civilians, although he has only once made good on a promise to stop a weapons shipment. In a letter sent Sunday, Secretary of State Antony Blinken and Defense Secretary Lloyd Austin told "the government of Israel that there are changes that they need to make ... from the very, very low levels that it is at today."

SEE THE LAW THAT BIDEN IS TRYING TO USE AGAINST ISRAEL

About 3 in 10 cameras part of Border Patrol's main surveillance system along the southern U.S. border are not working, making it more difficult for border agents to address crossings between ports of entry. The memo says about 150 out of 500 surveillance cameras mounted on towers are not operational due to "several technical problems." Since their introduction in 2011, the cameras have been vital for monitoring remote areas without deploying hundreds of agents in vehicles. 

SEE WHY REQUESTS FOR REPAIRS HAVE GONE UNANSWERED

The robot artist Ai-Da, a humanoid powered by artificial intelligence, will be the first of its kind to have a painting sold at a major auction house. The work, due to go under the hammer at Sotheby's in London, is a "haunting" portrait of the English mathematician Alan Turing, one of the fathers of modern computing. Entitled "AI God", the portrait is expected to fetch between GBP100,000 to 150,000 (US$130,000 to $196,000).

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Who is the artist and artwork that fetched the most money at auction?

Tuesday's answer: NATO's 12 founding nations (Belgium, Canada, Denmark, France, Iceland, Italy, Luxembourg, Netherlands, Norway, Portugal, the UK, and US) signed the 1949 treaty in Washington, D.C.