Event:
Drug maker Pfizer, Inc. has raised its offer to buy AstraZeneca Plc; the current offer of over 63 billion pounds was made after AstraZeneca rejected Pfizer's offer of 58.8 billion pounds in January
More Notable Events on May 1:
1997 Toni Blair elected Prime Minister of U.K.
1989 Disney's MGM Studio theme park officially opens to public
1963 1st American, James Whittaker, conquers Mount Everest
1937 Franklin D. Roosevelt signs act of neutrality
1931 Empire State Building opens in New York City
