A look back at what we’ve been covering on “CBS This Morning.” Source

Two former students at the University of Illinois at Urbana-Champaign are accusing a former professor of sexual, physical and emotional abuse. They filed a complaint in federal court, claiming the university is protecting Gary Xu despite numerous allegations and complaints against him. Meg Oliver sat down with one of the women, Vina Sun, who told us Xu abused her for about two years, using the fact she was an international student against her. Source

In our Eye On Earth series, we’re looking ahead to a landmark United Nations Climate Action Summit next week. Mark Phillips goes deep under the Florida Keys to the only undersea science lab in the world where marine biologists can live for weeks at a time, studying the effects of climate change on the ocean ecosystem. Source

Scientists at an underwater observatory off the Florida Keys are examining the effects of climate change on sea grass beds and the health of ecosystems Source

Hong Kong police fired tear gas and water cannon at protesters over the weekend as pro-democracy demonstrations turned violent yet again. CBS News foreign correspondent Ramy Inoncencio reports. Source

The U.S. Energy Department says it is ready to take action after drone attacks in Saudia Arabia crippled the world’s largest refinery and nearby oil fields. The facilities were shut down because of the attacks. Nikole Killion reports. Source

The Taliban has stepped up a vicious campaign on violence that took place during negotiations Source

This year — for the first time — the Taliban is losing more fighters than the Afghan military Source

Two Trump cabinet members have now blamed Iran for an attack on Saudi oil facilities that could force the U.S. to dip into its strategic reserve Source

Trump’s top diplomat has blamed Iran for an attack on Saudi oil facilities that could force the U.S. to dip into strategic reserve Source