Matt Dunham / AP

Four people were killed, including a police officer, and 40 injured after an attack outside of the United Kingdom's Houses of Parliament. An assailant mowed down pedestrians on Westminster Bridge before crashing his car into Parliament's gates and attacking police officers stationed there with a knife. The attacker was killed by police. Scotland Yard has confirmed that a full counterterrorism investigation is now underway.

Prime Minister Theresa May said in a speech on Downing Street that any attempt to defeat the values of freedom and liberty is "doomed to failure," concluding, "We will all move forward together — never giving into terror and never allowing the voices of hate and evil to drive us apart."

Both houses of Parliament will sit tomorrow at their scheduled times.

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Uber to buy Postmates in $2.65 billion deal

Illustration: Sarah Grillo/Axios

Uber has agreed to acquire food delivery company Postmates for $2.65 billion in an all-stock deal, the companies announced Monday.

Why it matters: This is the latest merger for the food delivery space as the sector undergoes an ongoing market consolidation.

Analysts expect soaring stock market despite slashed earnings forecasts

Data: FactSet; Chart: Axios Visuals

Despite cutting expectations for companies' earnings by the most in history and revenue by the most since 2009, Wall Street analysts are getting increasingly bullish on the overall direction of the U.S. stock market.

What's happening: Equity analysts are expecting earnings in the second quarter to fall by 43.8% — the most since 2008's fourth quarter 69.1% decline.

Case growth outpacing testing in coronavirus hotspots

Data: The COVID Tracking Project. Note: Vermont and Hawaii were not included because they have fewer than 20 cases per day. Chart: Andrew Witherspoon/Axios

The United States' alarming rise in coronavirus cases isn't due to increased testing — particularly not where cases have grown fastest over the last month.

Why it matters: The U.S. doesn't yet know what it looks like when a pandemic rages on relatively unchecked after the health system has become overwhelmed. It may be about to find out.