President Donald Trump made history this past week, but maybe not the kind he had hoped for. Trump is now the fourth U.S. president to become the subject of an impeachment inquiry, the U.S. constitutional process whereby Congress may remove a president from office.

ON THIS DAY IN AMERICAN HISTORY On September 30, 1954, the first nuclear-powered submarine, the USS Nautilus , is commissioned in Groton, Connecticut. The submarine was much bigger than previous, diesel-powered submarines and could stay submerged for nearly unlimited periods of time as nuclear reactors do not require air to work. Nautilus first ran on nuclear power on January 17, 1955, and soon began to break records such as being the first sub to travel under the North Pole. The sub was decommissioned in 1980 after traveling over 500,000 miles during its lifespan.

Exchanging companionship for financial support is not novel, but the internet has allowed people to connect more easily. That, combined with record-high tuition debt for many students — $37,000 on average or $1.6 trillion combined nationwide — has some students looking for “sugar daddies.”

Al-Shabab militants launched an attack on an airbase used by the U.S. military supporting Somali forces, security sources said.

Along the shores of Lake Malawi, poverty and food shortages are chronic problems, due to declining fish catches in the lake. Women facing hunger, or trying to feed their families, sometimes resort to having sex with fishermen in order to get something to eat.

China has developed a giant new offshore oil exploration platform for possible use in disputed territorial waters, a move that could anger Vietnam and extend years of energy-related disputes between the two Asian neighbors.