Harvard-Yale game delayed by student protest; 20-30 arrested

Demonstrators stage a protest on the field at the Yale Bowl disrupting the start of the second half of an NCAA college football game between Harvard and Yale, Saturday, Nov. 23, 2019, in in New Haven, Conn. (AP Photo/Jimmy Golen)

Demonstrators stage a climate change protest at the Yale Bowl delaying the start of the second half of an NCAA college football game between Harvard and Yale Saturday, Nov. 23, 2019, in in New Haven, Conn. (Arnold Gold/New Haven Register via AP)

Demonstrators stage a protest on the field at the Yale Bowl disrupting the start of the second half of an NCAA college football game between Harvard and Yale, Saturday, Nov. 23, 2019, in in New Haven, Conn. (AP Photo/Jimmy Golen)

Yale quarterback Kurt Rawlings attempts to get a first down against Harvard during the first half during an NCAA college football game, Saturday, Nov. 23, 2019, in New Haven, Conn. (Arnold Gold/New Haven Register via AP)

Yale punter Jack Bosman watches as demonstrators stage a protest on the field at the Yale Bowl disrupting the start of the second half of an NCAA college football game between Harvard and Yale, Saturday, Nov. 23, 2019, in in New Haven, Conn. (AP Photo/Jimmy Golen)

Demonstrators stage a climate change protest at the Yale Bowl delaying the start of the second half of an NCAA college football game between Harvard and Yale Saturday, Nov. 23, 2019, in in New Haven, Conn. (Arnold Gold/New Haven Register via AP)

Harvard coach Tim Murphy, right, gets an updated as demonstrators stage a protest on the field at the Yale Bowl disrupting the start of the second half of an NCAA college football game between Harvard and Yale, Saturday, Nov. 23, 2019, in in New Haven, Conn. (AP Photo/Jimmy Golen)

Demonstrators stage a protest on the field at the Yale Bowl disrupting the start of the second half of an NCAA college football game between Harvard and Yale, Saturday, Nov. 23, 2019, in in New Haven, Conn. (AP Photo/Jimmy Golen)

Demonstrators stage a protest on the field at the Yale Bowl disrupting the start of the second half of an NCAA college football game between Harvard and Yale, Saturday, Nov. 23, 2019, in in New Haven, Conn. (AP Photo/Jimmy Golen)