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Hello and welcome to your afternoon news update from The Associated Press. Today, the ceasefire in the Iran war faces its most perilous moment; the Supreme Court restores broad access to the abortion pill mifepristone; and a mini Pluto is thought to be the solar system’s smallest object yet.

UP FIRST

An Iranian tugboat floats in the foreground as cargo ships sit at anchor in the Strait of Hormuz off Bandar Abbas, Iran, on Monday. (Amirhosein Khorgooi/ISNA via AP)

What to know as the US tries to open the Strait of Hormuz and a ceasefire wavers

The ceasefire in the Iran war abruptly faced its most perilous moment Monday after the United States began trying to open the Strait of Hormuz to allow hundreds of stranded commercial ships sail out. The United Arab Emirates said it came under attack for the first time since the early April ceasefire, and a British military monitor said two cargo vessels were ablaze off the UAE. Read more.

TOP STORIES

Supreme Court restores access to abortion pill mifepristone through telehealth, mail and pharmacies

The Supreme Court on Monday restored broad access to the abortion pill mifepristone, blocking a ruling that had threatened to upend one of the main ways abortions are provided across the nation. The order temporarily allows women seeking abortions to obtain the pill at pharmacies or through the mail, without an in-person visit to a doctor. Those rules had been in effect for several years until a federal appeals court imposed new restrictions last week. Read more.

Astronomers believe they've detected an atmosphere around a tiny, icy world beyond Pluto

A new study suggests that a tiny, icy world beyond Pluto harbors a thin, delicate atmosphere that may have been created by volcanic eruptions or a comet strike. Just 300 miles or so across, this mini Pluto is thought to be the solar system’s smallest object yet with a clearly detected global atmosphere bound by gravity, said lead researcher Ko Arimatsu of the National Astronomical Observatory of Japan. Read more.