Donald Trump

A supporter holds up a sign for Republican presidential candidate Donald Trump during a South Carolina Republican primary night event, Saturday, Feb. 20, 2016 in Spartanburg, S.C. (AP Photo/Paul Sancya)

(Paul Sancya)

Republican presidential front runner Donald Trump

Here's what you need to know if you want to go see Trump in person:

When? Trump will be in Huntsville Sunday at 4 p.m. Doors will open at 2 p.m. Trump attracts large crowds at his rallies so you can expect heavy traffic and a full house.

Where? Trump will be at AAL USA Inc. at 2840 Wall Triana Highway. The rally will be held in the company's 68,000 square foot hangar.

Tickets? Tickets are free and can be obtained here. Registration is required. Once you register, you will be sent a digital or hard copy of your free ticket.

Security? Yes, as with all other rallies, there will be security in place for Trump's visit. You can expect bag searches and other measures to be in place.

What can I expect? Trump's rallies aren't just big, they are boisterous, too. Last Sunday, a protester apparently cut the lights during a Trump rally in Atlanta, Georgia leading supporters to begin chanting "Turn off the lights!" Trump joined in saying he liked the darker room so the lights remained dimmed. Protesters are common at Trump rallies, as are raucous supporters.

Why is the timing important? Trump's visit comes just days ahead of the March 1 Super Tuesday/SEC primary. The day is critical for candidates aiming for the White House, with Alabama, Arkansas, Georgia, Massachusetts, Oklahoma, Tennessee, Texas, Vermont and Virginia holding primaries that day and Alaska, Colorado, Minnesota and Wyoming holding Republican caucuses.

And that matters because...Security the presidential nomination is all about picking up delegates. Trump has more than all the other GOP candidates combined. You can see why that matters here.

Interesting note about Huntsville: Trump's rally is taking place in a city full of military and NASA personnel and defense contractors. A recent survey showed that almost a quarter of federal employees said they would consider leaving their jobs if Trump is elected. Among government employees that identify as Republicans, however, Trump held a strong lead, with 32 percent of the support in the early February poll.