It's been a week of surprise retirements, impeachment inquiries and aliens. Here's your GIFcap of this week's news.

1. Pres. Biden on Mon. marked the 22nd anniversary of the Sept. 11 attacks with an address at a military base in Alaska.

Biden was on his way back from a G20 summit in India; he also visited Vietnam over the weekend. (ABC News)

Biden: "So let that be the common cause of our time. Let us honor September 11 by renewing our faith in one another."

2. Colorado Rep. Lauren Boebert was kicked out of a "Beetlejuice" show in Denver this week after disruptive behavior.

Boebert was kicked out after several audience members reported her vaping, dancing and taking photos during the show.

Boebert addressed the incident on X Tue.: "I plead guilty to laughing and singing too loud!"

3. House Speaker Kevin McCarthy on Tue. directed three House committees to open an impeachment inquiry into Pres. Biden.

In his announcement Tue., McCarthy accused Biden of profiting from his son Hunter Biden's business dealings. (CNN)

Is there any evidence pointing to an impeachable crime? Per a CNN fact-checker, no evidence has been presented so far.

The GOP-led House Oversight Committee in Aug. subpoenaed six banks for records of the Biden family's finances.

Their search came up short: per CNN, Republicans found no records of Biden profiting from his family's business deals.

So, why an inquiry? McCarthy's announcement Tue. gives House Republicans broader subpoena powers going forward.

4. Self-described UFO expert Jaime Maussan made headlines Tue. after he unveiled what he claimed were alien corpses.

Maussan unveiled the bodies during a congressional hearing on UAPs at Mexico's Chamber of Deputies. (NPR)

Are they real? Not so fast: per USA Today, Maussan has a years-long history of presenting debunked alien discoveries.

5. Utah Sen. Mitt Romney on Wed. announced his retirement from the Senate, ending a decades-long political career.

Romney told reporters Wed. that his age was a deciding factor in his retirement:

Romney was first elected to the Senate in 2018; he was up for reelection in 2024. (AP)

That's all for this week!