9/11 is a date that people all over the world will never forget, a day when terrorist group al-Qaeda attacked the 110-storey Twin Towers of the World Trade Center (WTC), killing 2,977 people. The unexpected attack by the terrorist group using four hijacked passenger airliners of America happened at 8:46 am (EST) on 11 September 2001.

While American Airlines Flight 11 and United Airlines Flight 175 attacked the two towers of WTC, American Airlines Flight 77 was crashed into the Pentagon, the headquarters of the United States Department of Defence in Virginia by the terrorists.

US Patriot Day Greeting Cards

Following the attack, 9/11 has been observed as US Patriot Day every year.

14 Years of 9/11: Flashback of World Trade Centre Attack

Even though it is not a federal holiday, various memorial ceremonies have been arranged for the victims of the historical attack.

Check out some patriotic quotes by famous personalities that can be shared on US Patriot day:

Let every nation know, whether it wishes us well or ill, that we shall pay any price, bear any burden, meet any hardship, support any friend, oppose any foe to assure the survival and the success of liberty. — John F. Kennedy, 35th U.S. President

America was not built on fear. America was built on courage, on imagination and an unbeatable determination to do the job at hand. — Harry S Truman, 33rd U.S. President

My dream is of a place and a time where America will once again be seen as the last best hope of earth. — Abraham Lincoln, 16th U.S. President

Our flag honors those who have fought to protect it, and is a reminder of the sacrifice of our nation's founders and heroes. As the ultimate icon of America's storied history, the Stars and Stripes represents the very best of this nation. — Joe Barton, U.S. Representative

The patriot volunteer, fighting for country and his rights, makes the most reliable soldier on earth. — Stonewall Jackson, Confederate general during the American Civil War

True patriotism hates injustice in its own land more than anywhere else. — Clarence Darrow, American lawyer

The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants. — Thomas Jefferson, 3rd US President

I think there is one higher office than president and I would call that patriot. — Gary Hart, Former American senator

Saying you are a patriot does not make you one; wearing a flag pin does not in itself mean anything at all. — Viggo Mortensen, Danish American actor