U.S. marks 9/11 attacks anniversary

1. U.S. marks 9/11 attacks anniversary

2. Democratic presidential candidate Joe Biden and Vice President Mike Pence greet each other at the 911 Memorial & Museum in lower Manhattan. Amr Alfiky/Pool via REUTERS

3. New York City firefighters salute Vice President Mike Pence as he stops to visit them outside the Engine 10 and Ladder 10 NYFD firehouse after attending ceremonies in New York. REUTERS/Eduardo Munoz

4. President Trump and first lady Melania Trump attend a ceremony at the Flight 93 National Memorial in Stoystown, Pennsylvania. REUTERS/Jonathan Ernst

5. A woman places her hand on names of victims at the edge of the North pool during ceremonies. REUTERS/Carlo Allegri

6. People hug as they sit on a bench at the south refection pool during ceremonies. REUTERS/Carlo Allegri

7. Family members of victims sits along the edge of the South pool during ceremonies. REUTERS/Carlo Allegri

8. People place flowers on the names of victims at the edge of the South pool during ceremonies. REUTERS/Carlo Allegri

9. A woman pauses at the edge of the South pool. REUTERS/Carlo Allegri

10. Candian flags are seen left in the name of victim Kenneth William Basnicki at the edge of the North pool. REUTERS/Carlo Allegri

11. Uniformed U.S. Secret Service officers pause at the edge of the North pool during ceremonies. REUTERS/Carlo Allegri

12. Flowers and American flags are seen left in the names of victims at the edge of the North pool. REUTERS/Carlo Allegri

13. New York City Fire Department (FDNY) members stand at the edge of the North pool during ceremonies. REUTERS/Carlo Allegri

14. A girl places a flower on the edge of the North pool during ceremonies. REUTERS/Carlo Allegri

15. New York City Fire Department firefighters stand in formation outside Ladder Co. 10, Engine Co. 10 on the 19th anniversary of the September 11, 2001 attacks on the World Trade Center in Manhattan. REUTERS/Shannon Stapleton

16. People embrace during ceremonies in Manhattan. REUTERS/Andrew Kelly

17. New York City Fire Department firefighters salute outside Ladder Co. 10, Engine Co. 10 on the 19th anniversary of the September 11, 2001 attacks. REUTERS/Shannon Stapleton

18. President Trump and first lady Melania Trump stand with White House Press Secretary Kayleigh McEnany, White House Chief of Staff Mark Meadows and Transportation Secretary Elaine Chao as they pause for a moment of silence aboard Air Force One while en

19. The U.S. flag is unfurled at sunrise as part of the 19th annual September 11 observance ceremony at the Pentagon. REUTERS/Erin Scott

20. People embrace as they attend ceremonies marking the 19th anniversary of the September 11, 2001 attacks, in Manhattan. REUTERS/Andrew Kelly

21. Joe Biden holds his hand over his heart as he stands with his wife Jill Biden and Senate Minority leader Senator Chuck Schumer while attending ceremonies at the 911 Memorial & Museum. REUTERS/Eduardo Munoz

22. Vice President Mike Pence elbow bumps Jill Biden in greeting as her husband looks on during ceremonies at the 911 Memorial & Museum. REUTERS/Eduardo Munoz

23. Former New York City Mayor Rudolph Giuliani attends ceremonies in Manhattan. REUTERS/Andrew Kelly

24. People observe a moment of silence as they gather outside Ladder Co. 10, Engine Co. 10 in Manhattan. REUTERS/Shannon Stapleton

25. Diane Massaroli from Staten Island, New York, holds photos of her late husband Michael Massaroli in Manhattan. REUTERS/Andrew Kelly

26. People view names of victims while attending ceremonies in Manhattan. REUTERS/Andrew Kelly  

27. A man plays a trumpet during ceremonies at the 911 Memorial & Museum. REUTERS/Carlo Allegri

28. New York Governor Andrew Cuomo pauses to be photographed with the family member of a victim during ceremonies at the 911 Memorial. REUTERS/Carlo Allegri

29. A remembrance card of fallen FDNY Fire Marshal Ronald Bucca is seen left by his name at the edge of the South pool at the 911 Memorial. REUTERS/Carlo Allegri

30. Emily Torro, who lost her son Isaac Thomas Cortes the Iraq war, holds his photos as she arrives for ceremonies at the 911 Memorial & Museum. REUTERS/Shannon Stapleton

31. A man looks up during a moment of silence outside the World Trade Center site. REUTERS/Shannon Stapleton

32. U.S. Vice President Mike Pence speaks with New York Governor Andrew Cuomo at the September 11 Memorial & Museum. Amr Alfiky/Pool via REUTERS

33. President Trump and first lady Melania Trump place a wreath during a ceremony at the Flight 93 National Memorial in Stoystown, Pennsylvania. REUTERS/Jonathan Ernst

34. Two women holds hands as they walk to ceremonies at the 911 Memorial & Museum. REUTERS/Shannon Stapleton

35. A woman holds a frame of photos of a victim at the 911 Memorial & Museum. REUTERS/Carlo Allegri

36. A woman wears an American flag face mask as she attends ceremonies in Manhattan. REUTERS/Andrew Kelly

37. A man pauses at the edge of a reflecting pool at the 911 Memorial & Museum. REUTERS/Carlo Allegri

38. Port Authority of New York and New Jersey Police officers attend ceremonies in Manhattan. REUTERS/Andrew Kelly

39. A group of people embrace as they sit together during ceremonies at the 911 Memorial. REUTERS/Carlo Allegri

40. Vice President Mike Pence talks with firefighters outside the Engine 10 and Ladder 10 NYFD fire house in New York. REUTERS/Eduardo Munoz

41. Former New York City Mayor Rudolph Giuliani attends ceremonies in New York. REUTERS/Andrew Kelly

42. A members of the U.S. military plays taps at the Pentagon in Arlington, Virginia. REUTERS/Erin Scott

43. A boy sits on a social distancing circle marker at ceremonies in New York. REUTERS/Andrew Kelly  

44. Birds fly above the Flight 93 National Memorial during a ceremony in Stoystown, Pennsylvania. REUTERS/Jonathan Ernst

45. FDNY firefighters stand together at the entrance to Hook and Ladder 24 Engine Co. 1 in New York. REUTERS/Shannon Stapleton

46. Flowers are seen left in the names of victims at the edge of the North pool during ceremonies at the 911 Memorial. REUTERS/Carlo Allegri